Massachusetts police departments operate a growing network of automatic license plate readers, and prosecutors use the data these cameras collect as evidence in criminal cases. The cameras photograph passing vehicles, convert each plate to text, and store the plate number with the time, date, and location of the sighting. Officers query the stored records to place a specific car at a specific location on a specific day. That record can become central to the Commonwealth’s case.

Two matters drew attention in September 2026 to who controls this data. On September 14, 2026, the Boston Globe reported that outside law enforcement agencies were able to access Boston Police Department license plate reader data during a 2025 pilot program. The city’s contract with the vendor had required that access to be disabled. A bill pending in the Legislature would bar police from sharing the data with another agency except as required in a judicial proceeding. It would also bar them from obtaining another entity’s license plate reader data without a search warrant. A defendant facing charges built on license plate reader evidence can use these developments to test how the data in the case was collected and controlled.

How Automatic License Plate Readers Work

An automatic license plate reader is a camera paired with software that reads license plates. Some units are fixed to poles, bridges, and traffic signals. Others are mounted on police cruisers and read plates as the cruiser moves through traffic.

Each read creates a record. The record contains the plate number, a photograph of the vehicle, and the time, date, and location of the sighting. Vendors store these records in searchable databases. A single camera generates thousands of reads each day, and a regional network combines reads from many departments into one system.

Aggregation is what makes the stored data revealing. One read shows a car at one place. Thousands of reads across several weeks show a pattern of movement, including a driver’s home, workplace, and regular destinations.

Use of the Data in a Criminal Case

Prosecutors use license plate reader data to establish location and movement. In a case that depends on whether the defendant was present at a scene, a read that places the vehicle nearby at the relevant time supports the Commonwealth’s theory. In a case built on travel between two points, a series of reads can show a route.

Officers also use the data during investigations before charges issue. An officer queries a plate to learn where a vehicle has traveled, then builds the rest of the case from those leads. When the case reaches court, the reads may appear as exhibits, and the officer who ran the query may testify about what the database showed.

The evidence appears objective because it comes from a machine. That appearance of precision is a reason to examine the data closely. The reliability of a read and the lawfulness of the search that produced it are separate questions from the number on the screen.

The Constitutional Standard After Commonwealth v. McCarthy

The Supreme Judicial Court addressed license plate readers in Commonwealth v. McCarthy, 484 Mass. 493 (2020). The Court held that a person has a constitutionally protected expectation of privacy in the whole of their public movements under Article 14 of the Massachusetts Declaration of Rights. Widespread license plate reader surveillance can invade that interest.

On the facts before it, the Court found no search. The police used four fixed cameras at the ends of two bridges connecting Cape Cod to the mainland. Those cameras showed only whether the defendant was passing onto or off of the Cape at a given moment. The Court held that this limited surveillance did not permit the Commonwealth to monitor the whole of the defendant’s public movements, and it affirmed the denial of the motion to suppress.

The Court also described when the result would change. With enough cameras in enough locations, the historic location data from a license plate reader system would invade a reasonable expectation of privacy and would require a warrant, the same authority police must obtain to search a phone or computer. The Court explained that camera placement governs how invasive the surveillance becomes. Cameras near a home or a place of worship produce more revealing data than cameras on a highway. The Court declined to fix a bright line for how detailed the picture must be, which leaves the question open for litigation in each case.

The result is a fact-specific inquiry. The defense examines how many cameras contributed to the data, where those cameras stood, how long the records were kept, and how completely the combined reads mapped the defendant’s movements. The more complete the picture, the stronger the argument that the surveillance required a warrant.

Recent Massachusetts Developments

Two connected problems surfaced in 2026: unauthorized access to the data and misuse of the systems by officers.

On the access side, the Boston Globe reported on September 14, 2026 that outside law enforcement agencies were able to access Boston Police Department license plate reader data during a 2025 pilot program. The city’s contract had required that access to be disabled. Over the following five months the department received 77 requests for its data from other agencies. The department and the city have committed not to use the vendor going forward.

On the misuse side, reporting in 2026 has documented officers in Massachusetts departments, including Stow and New Bedford, using the databases to search for former partners. Reporting in 2025 described a Texas law enforcement agency searching the vendor’s nationwide network, including Massachusetts data, for a woman believed to have had an abortion. The sponsor of the pending House bill has cited out-of-state searches for people seeking reproductive or gender-affirming care as one reason for the bill.

On the local-control side, twenty-five Massachusetts municipalities have canceled contracts with the vendor Flock Safety or discontinued pilot programs over eighteen months, according to the American Civil Liberties Union of Massachusetts. The town of Boylston suspended its cameras in September 2026. A Suffolk County Superior Court judge has also ordered the Massachusetts State Police to release the audit logs of its license plate reader system and records of its camera locations.

These developments give the defense concrete facts to investigate. Where a department cannot show who accessed the data or under what authority, both the chain of custody and the lawfulness of the search come into question.

Proposed Legislation, House Bill 3755

Representatives Steve Owens and Lindsay Sabadosa filed House Bill 3755, An Act establishing driver privacy protections, in January 2025. The bill would regulate how law enforcement uses automatic license plate readers in Massachusetts.

The bill would prohibit anyone acting under color of state law from obtaining license plate reader data from another entity, governmental or private, without a valid search warrant. It would also prohibit disclosing the data or permitting access to it except as required in a judicial proceeding. It would bar the sale, lease, or purchase of the data. It would limit retention to fourteen days unless the records connect to a specific criminal investigation based on articulable facts linking the data to a crime. It would bar use of the technology to track or monitor activity protected by the First Amendment or by Articles II and XVI of the Massachusetts Declaration of Rights.

The House members of the Joint Committee on Transportation voted eleven to zero to report the bill favorably. The bill was referred to the House Committee on Ways and Means on March 23, 2026, where it remains. The provisions may be folded into a broader data privacy bill.

House Bill 3755 has not become law. The current rules for challenging license plate reader evidence come from Article 14 and McCarthy. The bill is relevant because its warrant and retention standards match the arguments the defense already makes under existing constitutional law.

Challenging License Plate Reader Evidence

The defense attacks license plate reader evidence on two fronts: the constitutionality of the search and the reliability of the data.

The constitutional challenge proceeds by motion to suppress. Counsel develops the extent of the surveillance, the number and placement of the contributing cameras, and the period the combined reads cover. Where the reads together show a detailed picture of the defendant’s movements, counsel argues under McCarthy that the collection was a search that required a warrant, and that the absence of a warrant requires suppression. Counsel also examines the lawfulness of any traffic stop that followed a read, and points to any outside agency that obtained the data without authority.

The reliability challenge tests the data itself. Automatic plate readers misread plates. Software can drop or transpose a character, so that the stored text shows a different plate than the vehicle photographed. Counsel compares the stored text against the photograph, examines the vendor’s error rate, and cross-examines the officer about the query and the database. Counsel also probes the chain of custody, because a record accessed and shared outside proper channels may be unreliable or inadmissible.

Where the motion to suppress succeeds, the location evidence leaves the case. Where the reliability challenge succeeds, the fact finder gives the evidence less weight at trial.

Obtaining the Records in Discovery

A person charged with an offense that rests on vehicle location should assume that license plate reader data may be part of the file. Counsel obtains the underlying records in discovery, including the reads, the photographs, the query logs, and the records of who accessed the data. Those materials determine whether a motion to suppress is available and whether the data can be challenged for accuracy. The same suppression practice governs a warrantless search of a vehicle and a motion to suppress in a motor vehicle stop.

Attorney Joe Serpa reviews the discovery in each case for evidence of this kind and litigates the constitutional and reliability questions the records present.

Key Takeaways

• Massachusetts police use automatic license plate readers, and prosecutors use the reads as evidence of a vehicle’s location and movement.
• In Commonwealth v. McCarthy, 484 Mass. 493 (2020), the Supreme Judicial Court held that a person has an Article 14 privacy interest in the whole of their public movements, and that a dense enough camera network can be a search requiring a warrant.
• The defense challenges this evidence by motion to suppress and by testing the accuracy of the reads.
• Reports in 2026 of unauthorized access to Massachusetts license plate reader data give a defendant new facts to investigate in a suppression motion.
• House Bill 3755 would require a search warrant before police obtain license plate reader data from another entity and would limit retention to fourteen days. It would also bar disclosure of the data except as required in a judicial proceeding. It has not become law.

Related Serpa Law Office Resources

• Illegal Searches and Seizures in Massachusetts: Article 14 and the Motion to Suppress
• Phone, Computer, and Digital Searches in Massachusetts
• Massachusetts Traffic Stops, Exit Orders, and Pretext Searches
• The Modern Massachusetts Traffic Stop: Phones, GPS, License Plate Readers, and the Fruit of the Poisonous Tree
• A Practitioner’s Guide to the Motion to Suppress in Massachusetts Motor Vehicle Stops
• Can Police Search My Car in Massachusetts Without a Warrant?
• Digital Search Warrants in Massachusetts

The court reversed both suppression orders. It did not establish a 109-day rule, a 123-day rule, or any other numerical deadline. The court applied a totality-of-the-circumstances test and held that the Commonwealth’s interests outweighed each defendant’s possessory interest on the records before it.

The limits of the decision are as important as the result. The court expressly disapproved of delay and directed law enforcement to treat applications for digital-device search warrants as a priority. Solis permits a court to uphold a lengthy delay when strong facts favor the Commonwealth. It does not give police permission to leave a seized phone in an evidence room while ordinary workload takes precedence.

The Two Seized Phones

The first case arose from allegations that Jose Solis sexually assaulted a thirteen-year-old child and attempted to photograph the child with a phone. Police arrested Solis on March 24, 2023, and seized the phone he handed to them. A later forensic interview described a phone of a different color and manufacturer. The assigned detective applied for a search warrant on July 11, 2023, 109 days after the seizure.

The detective attributed much of that delay to court hearings, trials, training, illness, other investigations, and staffing constraints. The warrant affidavit was eighteen pages long, but the SJC found that relatively little of it concerned the specific facts needed to establish probable cause to search Solis’s phone.

The second case involved Michael Diaz, who was accused of sexually abusing two children in his foster family and using a phone in connection with that conduct. When police arrived to arrest Diaz, a detective called his number and saw him come outside holding the phone that officers then seized. The detective had approximately eighty active investigations and placed the phone warrant work behind other matters. The application was filed 123 days later.

The trial judges suppressed the evidence found during both searches. They relied on Commonwealth v. White, 475 Mass. 583, 595 (2016), which held a 68-day delay unreasonable on the circumstances presented there. The SJC concluded that the trial judges placed too much weight on the number of days and too little weight on the remaining circumstances.

The Article 14 Standard

Article 14 of the Massachusetts Declaration of Rights protects against unreasonable searches and seizures. A lawful initial seizure does not resolve whether police may continue holding property. The continued seizure must remain reasonable while officers seek judicial authority to search the device.

In White, the SJC rejected a bright-line time limit. It required courts to examine the totality of the circumstances. Solis preserves that rule and organizes the analysis around three related considerations:

1. The strength of the defendant’s possessory interest in the device.
2. The extent of the government’s interference with that interest.
3. The strength of the Commonwealth’s reasons for retaining the device while it prepares a warrant application.

The number of days remains important. It is not decisive by itself.

Other Massachusetts cases illustrate the same fact-specific approach. Commonwealth v. Cruzado, 480 Mass. 275, 283 to 284 (2018), upheld a ten-day delay where probable cause and exigent circumstances supported the seizure and the defendant’s possessory interest was minimal. Commonwealth v. Arthur, 94 Mass. App. Ct. 161, 165 to 166 (2018), upheld an 85-day delay in part because the seized devices had evidentiary value independent of their contents. A divided Appeals Court had affirmed suppression in Diaz’s case at Commonwealth v. Diaz, 105 Mass. App. Ct. 809, 822 (2025). The SJC’s new decision reverses that result and supplies the controlling analysis.

The Defendant’s Possessory Interest

A smartphone may be indispensable to work, family responsibilities, finances, medical care, travel, and ordinary communication. The SJC therefore rejected any assumption that a cell phone involves only a minor possessory interest. A person can have a powerful interest in recovering a seized device even though the police have not searched its contents.

The court identified facts that can strengthen or weaken that interest. They include whether the defendant requested the phone’s return, whether the defendant showed a concrete need for it, whether the defendant claimed ownership, whether another equivalent phone was available, whether there was an opportunity to copy or remove important material before the seizure, and whether the defendant acknowledged that the device contained evidence or contraband.

Neither Solis nor Diaz requested the return of his phone. Neither presented evidence that the device was necessary for a particular work, family, financial, or medical obligation. Those omissions did not eliminate their possessory interests, but they reduced the weight assigned to them.

The Government’s Justification for Continued Retention

The Commonwealth’s interest depends on more than the fact that police lawfully acquired the device. Relevant considerations include the probable cause supporting the seizure, whether the physical device has evidentiary value apart from its contents, the seriousness of the suspected offense, the complexity of the particular warrant application, investigative developments after the seizure, how securely police stored the device, and whether officers worked diligently.

The SJC gave significant weight to the independent evidentiary value of both phones. In Solis’s case, the phone was an alleged instrument used in an attempt to create a prohibited image. The discrepancy between the seized Nokia phone and the child’s later description of a Samsung phone weakened the connection, but it did not eliminate probable cause. A witness may also identify a physical object, so the device itself could be evidence even apart from anything found in its memory.

In Diaz’s case, officers called Diaz’s number and then saw him emerge holding the seized phone. That observation connected the particular device to him and to the allegations. Later interviews also strengthened the evidentiary basis for retaining the phone.

The seriousness of the alleged offenses strengthened the Commonwealth’s interests in both cases. The court emphasized that the cases involved sexual exploitation of children. The result therefore arose from a particularly strong governmental interest, not from delay alone.

Police Workload Did Not Excuse the Delays

The Commonwealth prevailed, but the court did not accept routine workload as an adequate explanation for delay. It described generalized caseload and staffing pressures as insufficient and found a lack of diligence in both investigations.

The Solis warrant application was not unusually complex. Much of the delay resulted from the detective’s other obligations, and much of the affidavit was not case-specific. Diaz’s investigation was more complicated because it involved two children, earlier agency investigations, and multiple interviews. Even there, the detective’s decision to place the warrant work behind other cases weighed against the Commonwealth.

This part of the opinion controls in future suppression litigation. Probable cause and independent evidentiary value can support retention, but they do not erase unreasonable police neglect. Article 14 requires a case-specific explanation, and the court refused to adopt a federal rule under which the physical item’s evidentiary value would make almost any delay immaterial.

Why Solis Differs From Commonwealth v. White

Commonwealth v. White, 475 Mass. 583 (2016), involved a shorter delay of 68 days, but the SJC found it unreasonable. The comparison demonstrates why counting days cannot resolve the constitutional question.

In White, police lacked probable cause to believe that the seized phone contained evidence when they took it. The device had no established evidentiary value independent of its contents. Officers did not treat the warrant as a priority, and the investigation did not supply a case-specific reason for waiting. Those circumstances left the defendant’s possessory interest with little on the other side of the balance.

In Solis and Diaz, by contrast, the court found probable cause tied to the particular phones. Each phone could serve as evidence apart from the data later extracted. The allegations involved serious offenses against children, and neither defendant documented a special need for the phone or requested its return. Those combined facts outweighed the substantial intrusion caused by the lengthy retention.

Solis does not overrule White. It confirms that a delay shorter than 109 days can be unreasonable and a longer delay can be reasonable, depending on the complete record.

The Narrow Scope of the Holding

The decision does not establish a general period during which police may hold every seized phone. Several limits remain:

• A 109-day or 123-day delay is not automatically reasonable.
• Independent evidentiary value strengthens the Commonwealth’s position, but it does not excuse neglect.
• Ordinary workload and staffing constraints do not supply a sufficient case-specific justification.
• The defendant’s failure to request return of the phone is relevant, but it does not forfeit Article 14 protection.
• The seriousness of the alleged offense counts, and the court repeatedly identified the child-exploitation context of these cases.
• A court must examine the information available during the period of retention, including later investigative developments that are independent of any unlawful search.

The holding therefore concerns a particular combination of probable cause, independent evidentiary value, serious alleged offenses, diminished possessory claims, and continued investigative support.

Defense Issues After Solis

The defense record now counts even more when police retain a digital device. Several steps can affect the totality analysis.

Document the need for the device. A prompt written request for return can establish that the owner has not abandoned the possessory interest. The request should identify concrete consequences, such as lost access to employment, authentication applications, medical information, family communications, financial accounts, photographs, or data that cannot be restored from another device.

Examine the justification at each stage. The defense should determine what officers knew when they seized the phone, what they learned later, when they learned it, and whether the later information came from a lawful source independent of the phone’s contents.

Separate genuine complexity from ordinary workload. A lengthy affidavit does not prove that a warrant application required months of work. The relevant question is how much case-specific investigation and drafting were necessary, not how many pages resulted.

Challenge the claimed evidentiary value of the physical device. A phone does not become an instrumentality merely because most people own phones or because digital evidence might exist somewhere. The Commonwealth must connect the particular device to the alleged conduct. Identification discrepancies, uncertain ownership, multiple devices, and speculative assumptions can weaken that connection.

Review seizure, retention, warrant, and extraction separately. A lawful arrest does not necessarily justify taking the phone. A lawful seizure does not necessarily justify holding it for months. A lawful retention does not establish probable cause to search. A valid warrant does not authorize examination of every file and every date range. The office’s guide to phone, computer, and digital-device searches in Massachusetts explains those distinct issues, and the Massachusetts phone and computer search FAQs address common questions about warrants, passcodes, consent, and digital extractions.

Frequently Asked Questions

Key Takeaways

• Commonwealth v. Solis, SJC-13823, and Commonwealth v. Diaz, SJC-13835, were decided on August 12, 2026.
• The SJC reversed suppression orders involving delays of 109 and 123 days.
• Article 14 imposes no fixed numerical deadline for a warrant application after police seize a phone.
• Courts must balance the defendant’s possessory interest and the intrusion against the Commonwealth’s case-specific justification for continued retention.
• General workload does not excuse delay, and digital-device warrant applications must receive priority.
• The decision does not create a general 109-day or 123-day safe harbor.

Related Serpa Law Office Resources

• Phone, Computer, and Digital Device Searches in Massachusetts
• Massachusetts Phone and Computer Search FAQs
• Digital Search Warrants in Massachusetts
• Illegal Searches and Seizures in Massachusetts
• Your Rights and Legal Concepts in a Massachusetts Criminal Case

This article provides general information about Massachusetts law. It is not legal advice and does not create an attorney-client relationship. Legal outcomes depend on the facts and procedural history of each case.

This guide reviews the controlling standards at each stage of a motor vehicle stop, the recent timing and pretext decisions, the procedural requirements of Mass. R. Crim. P. 13, and the scope of the suppression remedy.

The Legal Basis for the Stop

A police stop of a moving vehicle is a seizure, and it must be reasonable to be valid under art. 14. Commonwealth v. Buckley, 478 Mass. 861, 865 (2018), citing Commonwealth v. Rodriguez, 472 Mass. 767, 773 (2015). Two justifications recur. First, an observed violation of the traffic laws authorizes a stop: “Where the police have observed a traffic violation, they are warranted in stopping a vehicle.” Commonwealth v. Bacon, 381 Mass. 642, 644 (1980). Second, in the absence of an observed violation, the police must have “reasonable suspicion, based on specific, articulable facts and inferences therefrom, that an occupant . . . had committed, was committing, or was about to commit a crime.” Commonwealth v. Long, 485 Mass. 711 (2020), quoting Commonwealth v. Manha, 479 Mass. 44, 46 (2018). A defective taillight or an unlit registration plate is enough.

The first line of review is factual: the citation, the dispatch records, and cruiser camera footage often establish where the officer sat, what could be seen from that position, and whether the claimed infraction occurred at all. Where an alert from an automatic license plate reader prompted the stop, the license plate reader evidence and the query records behind it belong in the same review.

The Timing of the Stop

When an officer observes a traffic violation, the officer may stop the vehicle to address that violation, but an observed civil infraction “cannot hang over a suspect indefinitely.” Commonwealth v. Daveiga, 489 Mass. 342, 350, 353 (2022). In Commonwealth v. Arias, SJC-13816 (Mass. Apr. 15, 2026), the Supreme Judicial Court held that a stop for a civil traffic infraction violates art. 14 if it occurs after an unreasonable delay, judged on the totality of the circumstances.

There is no fixed time limit; the elapsed time between the observed violation and the stop must be reasonable, and the Commonwealth bears the burden of justifying it. In Arias, officers conducting a drug investigation watched the defendant commit a traffic infraction, waited 24 hours, and then stopped the vehicle on that basis. Because the Commonwealth offered no reasonable justification for a delay of that length, the court held that the motion to suppress should have been granted and vacated the judgment. Counsel should assemble a timeline from the reports, radio transmissions, and citation timestamps whenever the stop did not immediately follow the violation.

Pretextual Stops and Equal Protection

Under art. 14, the validity of a stop does not depend on the officer’s subjective motives. Massachusetts follows the authorization test: a traffic stop is reasonable “so long as the police are doing no more than they are legally permitted and objectively authorized to do.” Buckley, 478 Mass. at 865, quoting Commonwealth v. Santana, 420 Mass. 205, 209 (1995). An officer who observes an infraction may stop the vehicle even where the actual aim is a narcotics investigation. Buckley, 478 Mass. at 865-866. The court reaffirmed the rule in Arias while suppressing on delay grounds.

A stop motivated by race is a different matter, and it is analyzed under the equal protection principles of arts. 1 and 10 of the Massachusetts Declaration of Rights. In Long, 485 Mass. at 713, the Supreme Judicial Court lowered the required showing: the defendant must establish “a reasonable inference that the officer’s decision to initiate the stop was motivated by race or another protected class.” The inference may rest on specific facts drawn from the totality of the circumstances, gathered through personal knowledge, investigation, or discovery; statistical analysis is not required. Id. at 723-724. If the inference is raised, the defendant is entitled to an evidentiary hearing at which the Commonwealth must rebut it, and the Commonwealth must “do more than merely point to the validity of the traffic violation.” Id. at 726. A bare denial of bias by the officer is insufficient. Id. at 734. Absent a successful rebuttal, all evidence derived from the stop is suppressed, and a stop motivated by race is unconstitutional even where enforcing the traffic laws was also a genuine motive.

The court has since extended the Long standard beyond the motor vehicle context: it “applies equally to pedestrian stops and threshold inquiries, as well as other selective enforcement claims challenging police investigatory practices.” Commonwealth v. Robinson-Van Rader, 492 Mass. 1 (2023). In Commonwealth v. Stroman, 103 Mass. App. Ct. 122 (2023), the Appeals Court affirmed a finding that the Commonwealth rebutted the inference with credited testimony that the officer did not know the driver’s race until after the stop. Counsel should pursue the discovery contemplated by Long, 485 Mass. at 725, early, because the motion must raise the inference before a hearing is ordered.

The Exit Order

Massachusetts law departs sharply from federal law at the exit order. In Commonwealth v. Gonsalves, 429 Mass. 658, 662-663 (1999), the Supreme Judicial Court declined to follow Pennsylvania v. Mimms, 434 U.S. 106 (1977), and Maryland v. Wilson, 519 U.S. 408 (1997), which permit automatic exit orders, and held that in a routine traffic stop an officer must have “a reasonable belief that the officer’s safety, or the safety of others, is in danger” before ordering a driver out of the vehicle. The court applied the same requirement to passengers: “No exit order may be given to the driver or any passenger in a routine traffic stop without the police officer’s having an objective reasonable basis to justify the order.” Id. at 666 n.5.

In Commonwealth v. Torres-Pagan, 484 Mass. 34, 38 (2020), the court restated the justifications: an exit order is proper during a traffic stop where “(1) police are warranted in the belief that the safety of the officers or others is threatened; (2) police have reasonable suspicion of criminal activity; or (3) police are conducting a search of the vehicle on other grounds.” The safety threshold is low: “it does not take much for a police officer to establish a reasonable basis to justify an exit order or search based on safety concerns.” Gonsalves, 429 Mass. at 664. A mere hunch is not enough, and nervousness and fidgeting alone did not justify the order in Gonsalves itself.

Because G. L. c. 94C, §§ 32L-32N, made simple marijuana possession (now two ounces or less) a civil violation rather than a crime, the odor of burnt marijuana alone “cannot reasonably provide suspicion of criminal activity to justify an exit order.” Commonwealth v. Cruz, 459 Mass. 459 (2011). Some additional fact suggesting an actual crime is required.

The Patfrisk

An exit order, standing alone, does not authorize a patfrisk. “The test for a patfrisk is more stringent than for an exit order.” Commonwealth v. Powell, 102 Mass. App. Ct. 755 (2023). To justify the frisk, “an officer needs more than safety concerns”: the police must have “a reasonable suspicion, based on specific articulable facts, that the suspect is armed and dangerous.” Torres-Pagan, 484 Mass. at 37, 38-39. In Powell, a flyer reporting that the car had been used in a shooting 34 hours earlier, with no description of the occupants, did not justify the patfrisk of a passenger.

The scope of the frisk is limited by its purpose. A protective search must be “confined to what is minimally necessary to learn whether the suspect is armed.” Commonwealth v. Amado, 474 Mass. 147 (2016), quoting Commonwealth v. Almeida, 373 Mass. 266, 272 (1977). In Amado, an officer pulled back the defendant’s waistband and removed a bag of narcotics; the court held that the maneuver was a strip search, which requires probable cause under art. 14, and reversed the denial of suppression. Nervousness adds little at this stage as well: it is “a common and entirely natural reaction to police presence.” Commonwealth v. Cordero, 477 Mass. 237 (2017).

The Search of the Vehicle

A warrantless search of the vehicle must fall within an exception to the warrant requirement, most often the automobile exception. Police may search where they have “probable cause to believe that a motor vehicle on a public way contains contraband or evidence of a crime.” Commonwealth v. Cast, 407 Mass. 891, 901 (1990). The inherent mobility of the vehicle supplies the exigency. Where the police have probable cause as to the vehicle itself, the lawful search “extends to all containers, open or closed, found within,” limited by the object of the search and the places that could conceal it. Id.

Marijuana odor cases follow their own line. The odor of burnt marijuana alone does not establish probable cause to search, Cruz, 459 Mass. 459, and the odor of unburnt marijuana, “standing alone, does not provide probable cause to search an automobile.” Commonwealth v. Overmyer, 469 Mass. 16 (2014). The court reasoned that officers cannot reliably distinguish a civil amount, one ounce or less, from a criminal amount by smell. Chapter 65 of the Acts of 2026 raised those quantities effective April 19, 2026: an adult may possess two ounces outside the home, and simple possession through three ounces is civil.

The Duration and Scope of the Stop

A stop that is lawful at its inception can become unlawful by lasting too long. A routine traffic stop may not last “longer than reasonably necessary to effectuate the purpose of the stop.” Amado, 474 Mass. at 151. Police authority to detain ends when the tasks tied to the infraction, the license check and the citation or warning, are completed or reasonably should have been completed. Cordero, 477 Mass. at 242. To expand the inquiry and prolong the detention, an officer “must reasonably believe that there is further criminal conduct afoot,” and that belief must rest on specific and articulable facts. Cordero, supra.

In Cordero, a trooper held the driver for 40 to 45 minutes after a stop for defective lights and window tint, questioning the driver about drugs on the strength of nervousness, travel from a “source city,” and a prior record; the Supreme Judicial Court held the prolonged detention unlawful. The principle is an old one: “Citizens do not expect that police officers handling a routine traffic violation will engage . . . in stalling tactics, obfuscation, strained conversation, or unjustified exit orders, to prolong the seizure . . . .” Gonsalves, 429 Mass. at 663.

Suppression Procedure Under Rule 13

Mass. R. Crim. P. 13(a)(2) governs the papers. The motion must state every ground then available, “set forth with particularity,” and it must be supported by an affidavit detailing “all facts relied upon in support of the motion,” signed by a person with personal knowledge. Mass. R. Crim. P. 13(a)(2), as appearing in 442 Mass. 1516 (2004); Commonwealth v. Mubdi, 456 Mass. 385, 389 (2010). The rule requires enough detail to permit the judge to determine whether an evidentiary hearing is warranted and to give the Commonwealth fair notice of the search or seizure being challenged. Mubdi, 456 Mass. at 389.

The burden of compliance rests on the defense. In Commonwealth v. Delossantos, 492 Mass. 242 (2023), the Supreme Judicial Court held that “the burden of compliance with the particularity requirement of rule 13 (a) (2) falls on the defendant alone,” and that overbroad and bare assertions will not satisfy the rule. The waiver provision is strict: grounds not stated “which reasonably could have been known at the time a motion is filed shall be deemed to have been waived.” Mass. R. Crim. P. 13(a)(2). The safe practice is to plead every viable theory: the stop, the timing, the exit order, the patfrisk, the search, the duration, and any equal protection claim. A defendant charged with a possessory offense has automatic standing under art. 14 to challenge the search of the place where the object was allegedly found, including an automobile. Mubdi, 456 Mass. at 391.

At the hearing, once it is established that the police acted without a warrant, the Commonwealth bears the burden of proving that the seizure and any search were reasonable. Commonwealth v. White, 475 Mass. 583, 587-588 (2016). A reviewing court accepts the motion judge’s subsidiary findings of fact absent clear error and independently reviews the application of constitutional principles to the facts found. Cordero, supra. Under G. L. c. 278, § 28E, the Commonwealth may appeal a District Court order allowing suppression to the Appeals Court, and either party may apply to the Supreme Judicial Court for interlocutory review of a Superior Court suppression determination before trial; a denied application leaves the ruling open to review after trial.

The Fruits Doctrine and the Remedy

Suppression is not limited to the item seized. “The general rule is that evidence is to be excluded if it is found to be the ‘fruit’ of a police officer’s unlawful actions.” White, supra, quoting Commonwealth v. Balicki, 436 Mass. 1, 15 (2002). Under Wong Sun v. United States, 371 U.S. 471, 484-488 (1963), the exclusionary rule requires suppression of the indirect as well as the direct products of the illegality, including verbal statements. The question is “whether, granting establishment of the primary illegality, the evidence to which instant objection is made has been come at by exploitation of that illegality or instead by means sufficiently distinguishable to be purged of the primary taint.” Id. at 488. Evidence remains admissible only where the connection has “become so attenuated as to dissipate the taint” or where the police learned of it from an independent source. Id.

In a motor vehicle case, a successful challenge to the stop ordinarily requires suppression of the officer’s subsequent observations, the products of the exit order and the patfrisk, the contraband, and the roadside statements; where that evidence is the proof of the charged offense, the prosecution frequently cannot proceed.

The Bottom Line for a Pending Case

A motor vehicle suppression motion presents ordered questions: whether the stop was justified when made and made within a reasonable time of the violation; whether race can reasonably be inferred as a motive; whether the exit order rested on a reasonable belief that safety was in danger; whether the patfrisk rested on specific articulable facts that the person was armed and dangerous; whether probable cause supported any search; and whether the detention outlasted its purpose. The standards differ at each stage, the Commonwealth has the burden once the warrantless character of the police action is shown, and a defect at any stage can require suppression of everything that followed. Serpa Law Office litigates these motions in the District Courts and Superior Courts of eastern Massachusetts.

The same sequence, written for the person stopped rather than for referring counsel, appears on the firm’s page on Massachusetts traffic stops, exit orders, and pretext searches, which also covers protective patdowns of bags and other belongings.

Referring counsel may reach Attorney Serpa at 617.936.0201.

Last Reviewed: July 2026

On June 29, 2026, the United States Supreme Court held in Chatrie v. United States, No. 25-112, 609 U.S. ___ (2026), that police conducted a Fourth Amendment search when they acquired a suspect’s Google Location History data, because a person keeps a reasonable expectation of privacy in cell phone location information. The judgment was 6 to 3, and Justice Kagan wrote the opinion of the Court for five Justices; Justice Gorsuch supplied the sixth vote for the judgment on a separate property theory.

It is the most important digital privacy ruling since Carpenter v. United States, 585 U.S. 296 (2018), and it lands on ground Massachusetts courts prepared years ago.

The decision vacated and remanded United States v. Chatrie, 136 F.4th 100 (4th Cir. 2025) (en banc). The Court decided that the Fourth Amendment applies. It decided nothing about whether this warrant, or any geofence warrant, is valid, and Mr. Chatrie himself has not yet suppressed anything. Both halves of that sentence matter to a Massachusetts defendant, and this post covers both.

What a Geofence Warrant Is

A geofence warrant works backwards. Instead of identifying a suspect and asking where his phone was, police draw a box around a crime scene and ask a provider, usually Google, to identify every device inside the box during a window of time. The technique searches the location histories of everyone who passed through, almost all of them innocent, in the hope that one of them is the suspect. The Chatrie case began with a Virginia bank robbery and a warrant that swept the location data of every Google user near the bank for a two hour window.

What the Court Held

The majority held that people keep a reasonable expectation of privacy in their cell phone location data. A government demand for it intrudes on a constitutionally protected interest even when the window is short and the data sits with a third party. There is no short-duration pass. The Court wrote that Fourth Amendment protections do not kick in only once an intrusion goes too far. Where the Amendment applies, it applies regardless of the quality or quantity of information the government obtains.

The Court also rejected the government’s argument that users voluntarily share this data with Google, describing the exposure of the information as what happens when a user avails himself of the services on his phone. Just as the third-party doctrine did not apply in Carpenter, it does not apply to Location History. That reasoning extends Carpenter, where the Court reached the same conclusion for historical cell site location information, and it continues the retreat from the old third-party doctrine in digital cases.

What the Court Left Open

The Court remanded every question about this warrant’s validity: probable cause, particularity, and the lawfulness of the second and third steps, in which officers widened the time window and de-anonymized selected devices. All of that is now before the Fourth Circuit, which must evaluate the warrant at each step of the search process. The good-faith exception question was not part of the grant of certiorari, and the Court expressly left the Fourth Circuit free to consider it anew.

Two Justices went further. Justice Jackson, joined by Justice Sotomayor, wrote separately that she would have held this search unconstitutional, and her concurrence attacks the discretion the warrant left to officers at the second and third steps. That is a two-Justice concurrence, not the Court’s holding, and it reads as the argument the defense will make on remand rather than a rule.

So the practical state of federal law is this: acquiring Location History requires a warrant that satisfies probable cause and particularity at each step, and no one yet knows how narrow those warrants must be. In federal court, the government will argue that officers who relied on earlier law acted in good faith. The dissent read the majority as leaving the Fourth Circuit’s good-faith ruling untouched. That is where the federal fight now lives.

Massachusetts Was Already There

For Massachusetts defendants, Chatrie confirms a direction our courts chose first. The Supreme Judicial Court held in Commonwealth v. Augustine, 467 Mass. 230 (2014), S.C., 470 Mass. 837 (2015) and 472 Mass. 448 (2015), four years before Carpenter, that police generally need a warrant for historical cell site location data under Article 14 of the Massachusetts Declaration of Rights.

Commonwealth v. Estabrook, 472 Mass. 852 (2015), then set the boundary: a request for up to six hours of historical telephone-call CSLI needs no warrant, and the six hours is measured by what the Commonwealth requests, not by the slice it later offers at trial.

The rest of the framework grew case by case, and its outcomes deserve stating precisely. Commonwealth v. Almonor, 482 Mass. 35 (2019), held under art. 14 that police causing a phone to reveal its real-time location is a search, and then reversed the suppression order on exigent circumstances. Commonwealth v. McCarthy, 484 Mass. 493 (2020), adopted mosaic reasoning for automatic license plate readers, held that four fixed cameras on two bridges did not invade the defendant’s expectation of privacy, and affirmed the denial of suppression.

Commonwealth v. Mora, 485 Mass. 360 (2020), held that months of pole camera surveillance of a home is a search under art. 14 and remanded for a probable cause determination rather than ordering suppression.

The most recent word runs the other way for short windows. In Commonwealth v. Govan, SJC-13600 (Mass. June 4, 2025), the SJC held that the warrantless review of roughly twenty minutes to an hour of historical GPS data from a pretrial monitoring bracelet was not a search. Surveillance that short reveals details from isolated incidents rather than a pattern of life, and the court affirmed the denial of suppression.

A short-window geofence argument under the mosaic theory has to reckon with Govan, and the better art. 14 framing after Chatrie is the one the Supreme Court used: the acquisition of the location data itself, at any duration, is the search.

Our pages on phone, computer, and digital device searches and illegal searches and seizures explain how Article 14 routinely protects more than the federal floor. Chatrie raises that floor.

The Massachusetts Advantage: No Good-Faith Exception

No Massachusetts appellate court has yet decided a geofence warrant case. The issue is open, and it will be litigated on the framework above. That openness favors the defense here more than it would in most states, for one reason above all.

Massachusetts recognizes no good-faith exception under art. 14. Where a search warrant issues without probable cause, the evidence is excluded even if the officer relied on the warrant in objectively reasonable good faith. Commonwealth v. Fredericq, 482 Mass. 70 (2019); Commonwealth v. Upton, 394 Mass. 363 (1985).

Good faith is the doctrine that has saved geofence evidence in federal court at every stage of Chatrie itself, and it is the doctrine the Fourth Circuit may use again on remand. It has no counterpart in a Massachusetts courtroom. A geofence warrant that fails probable cause or particularity under art. 14 is not rescued by the officer’s reliance on it. For a defendant with a choice of forum arguments, that difference is the whole case.

Fredericq supplies a second tool. Evidence may be suppressed as the fruit of the poisonous tree even if it is found in a place where the defendant has no reasonable expectation of privacy. In a geofence case, where the return identifies the client and the physical evidence turns up later somewhere else, that rule is what extends the taint to the evidence found afterward.

What It Means for Massachusetts Cases

Any Massachusetts case built on a geofence return now has a suppression issue worth litigating. After Chatrie, the acquisition is a search, so a warrant is required, and the warrant must rest on probable cause and describe the search with particularity at each step. A box drawn around a busy block for an open-ended window will struggle on both fronts. The second and third steps, where officers widen the window and pick the devices to de-anonymize, are separately attackable, which is exactly why the Supreme Court directed review at each step.

Reverse keyword warrants and tower dumps raise the same everyone-to-find-someone objection, and the argument for extending Chatrie to them is strong, but no controlling authority has extended it yet. Chatrie says nothing about either technique. The leading federal appellate decision on geofence warrants themselves, United States v. Smith, 110 F.4th 817 (5th Cir. 2024), held them unconstitutional general warrants while still applying the good-faith exception; it is persuasive authority only. Counsel frames these as arguments to win, not rules to invoke.

The Commonwealth’s answers will come from three derivative-evidence doctrines, and the defense should brief them before the Commonwealth does. Independent source: evidence first found through an unlawful search is admissible if later acquired independently by lawful means, and the Commonwealth bears the burden by a preponderance of showing the absence of taint. Commonwealth v. Estabrook, 472 Mass. 852 (2015).

Inevitable discovery: Massachusetts requires proof that lawful discovery was certain as a practical matter, a demanding test measured at the time of the unlawful seizure, stricter than the federal rule. Commonwealth v. O’Connor, 406 Mass. 112 (1989); Commonwealth v. Balicki, 436 Mass. 1 (2002).

Attenuation: three factors, elapsed time, intervening circumstances, and the purpose and flagrancy of the misconduct, and consent obtained by confronting the client with the tainted return does not attenuate anything. Commonwealth v. Fredericq, 482 Mass. 70 (2019).

Discovery should track the steps rather than asking generally for the warrant package. Counsel demands the complete affidavit and every attachment, the coordinates, radius, and time window, and what the magistrate was told about how many uninvolved people the box would sweep in. Counsel demands the warrant’s own terms for the second and third steps and whether any judge reviewed the narrowing, or whether officers applied their own criteria, which is the discretion the Jackson concurrence attacked.

Counsel demands Google’s native productions at each step with device counts, the de-anonymization request, every investigative step between the anonymized return and the client’s name, and every later warrant whose probable cause rests on the return. Preservation letters go out immediately, before the provider purges the underlying data.

The framework is laid out in our post on digital search warrants in Massachusetts and in the digital search FAQs. Location data questions in car cases are covered in our guide to the modern Massachusetts traffic stop.

Timing of the Fourth Amendment Ruling

Chatrie is best understood as the fourth step in a line the Court has been walking for fifteen years. United States v. Jones, 565 U.S. 400 (2012), held that attaching a GPS tracker to a car is a search. Riley v. California, 573 U.S. 373 (2014), required a warrant to search a phone seized at arrest and recognized that digital devices hold the privacies of life.

Carpenter, 585 U.S. 296 (2018), then refused to let the government use the old third-party doctrine of Smith v. Maryland, 442 U.S. 735 (1979), and United States v. Miller, 425 U.S. 435 (1976), to obtain week-long location histories without a warrant. Chatrie completes the thought. If the government cannot demand your location history by name without a warrant, it cannot avoid the problem by demanding everyone’s location history by place.

A new Fourth Amendment rule applies to cases still pending on direct review where the issue has been preserved. Griffith v. Kentucky, 479 U.S. 314 (1987). Massachusetts states the same rule for its own new search rules, with the same preservation condition. Commonwealth v. Augustine, 467 Mass. 230 (2014). So counsel raises Chatrie now, in writing, in every pending case that involves a geofence return, a tower dump, or a reverse keyword demand.

Retroactive application of the search holding is not the same thing as suppression: in federal court the good-faith exception still stands between the client and exclusion, which is one more reason the art. 14 route matters.

Massachusetts already requires a warrant when police cause a phone to reveal its real-time location, Commonwealth v. Almonor, 482 Mass. 35 (2019), and the combination of Chatrie and Article 14 gives Massachusetts defendants two independent bodies of law to litigate under.

Who Geofence Cases Sweep In

Geofence returns do not select for guilt. They select for proximity, and in Boston and Cambridge proximity means students and young professionals. A box drawn around a late-night incident near a campus, a stadium, or a nightlife block sweeps in every phone in the crowd, and the person contacted weeks later is often a college or university student with no idea why police are calling. The right response is silence and a lawyer, as our guides on the right to remain silent and the first 24 hours after an arrest explain.

For a licensed professional or anyone whose career depends on background checks, the arraignment itself is the injury, which makes the suppression fight and the pre-arraignment posture of these cases worth everything. Where the case begins with a complaint application instead of an arrest, the clerk-magistrate hearing is the place to attack a thin geofence identification before any record exists.

Serpa Law Office litigates digital search issues across Massachusetts. If your case involves location data, a device search, or any warrant you have not seen, contact Serpa Law Office at 617.936.0201 for a confidential consultation.

Most of these cases depend on seven questions.

1. Why Was the Car Stopped?

Where an officer observes a traffic violation, the stop is authorized. Massachusetts uses an authorization test rather than a suspicion test for that situation: a stop is reasonable “so long as the police are doing no more than they are legally permitted and objectively authorized to do, regardless of the underlying intent or motivations of the officers involved.” Commonwealth v. Buckley, 478 Mass. 861, 865 (2018). See Commonwealth v. Bacon, 381 Mass. 642, 644 (1980) (“Where the police have observed a traffic violation, they are warranted in stopping a vehicle”).

That means a pretextual stop, one made because officers want to investigate something else, is lawful under art. 14 if a violation in fact occurred.

Reasonable suspicion is the standard for a different situation, the investigatory stop of a vehicle on suspicion of criminal activity where no violation has been observed. Commonwealth v. Manha, 479 Mass. 44, 46 (2018). A profile, out-of-state plates, a rental car, or nervousness at the sight of a cruiser does not establish it. An alert from the license plate readers that many departments operate raises separate questions about the accuracy of the read and the lawfulness of the query.

Two further limits apply to the stop itself. An observed violation does not authorize a stop at any later time the officer chooses. In Commonwealth v. Arias, No. SJC-13816 (Mass. Apr. 15, 2026), the Supreme Judicial Court held that “[a] stop for an infraction is not reasonable if, upon consideration of the totality of the circumstances, the stop occurred after an unreasonable delay,” and that an observed infraction “cannot hang over a suspect indefinitely until a time at which he has engaged in some other suspicious activity that officers believe warrants a pretextual stop.”

And a lawful stop may not be prolonged past its purpose. “The police do not earn ‘bonus time’ to conduct additional investigations by an expeditious performance of the traffic-related investigation.” Commonwealth v. Cordero, 477 Mass. 237, 241 to 242 (2017). See Commonwealth v. Tavares, 482 Mass. 694, 703 (2019).

A stop motivated by race raises a different constitutional question. It is not an art. 14 unreasonable-seizure claim. Buckley, 478 Mass. at 872 to 873 (“to the extent we do consider the purpose of a stop when assessing its validity, we do so pursuant to the equal protection principles of arts. 1 and 10, not art. 14’s guarantee against unreasonable seizures”).

The governing framework is Commonwealth v. Long, 485 Mass. 711 (2020), under which a defendant must establish a reasonable inference that the decision to stop was motivated by race, without needing statistical analysis or conclusive evidence, at which point the Commonwealth bears the burden of rebutting the inference.

Long also recognizes a right to reasonable discovery of the officer’s recent stops and field interrogations under Mass. R. Crim. P. 14(a)(2). The Massachusetts traffic stop FAQs explain how these principles apply in practice.

2. Why Was Anyone Ordered Out of the Car?

Massachusetts rejects the federal rule permitting an officer to order occupants out of a vehicle during any stop. Commonwealth v. Gonsalves, 429 Mass. 658, 662 to 663 (1999), declining to follow Pennsylvania v. Mimms and Maryland v. Wilson.

An exit order requires one of three justifications. Police must be “(1) . . . warranted in the belief that the safety of the officers or others is threatened; (2) have reasonable suspicion of criminal activity; or (3) [be] conducting a search of the vehicle on other grounds.” Commonwealth v. Barreto, 483 Mass. 716, 722 (2019); Commonwealth v. Torres-Pagan, 484 Mass. 34, 38 (2020). The Supreme Judicial Court restated the same three grounds in Commonwealth v. Robinson, No. SJC-13756 (Mass. Feb. 13, 2026).

The threshold on the safety ground is not high. “[I]t does not take much for a police officer to establish a reasonable basis to justify an exit order.” Gonsalves, 429 Mass. at 664. But nervousness alone is not enough. Barreto, 483 Mass. at 723. And the second ground requires suspicion of criminal activity, which a civil infraction is not.

A patfrisk is a separate question with a higher standard, and the distinction is frequently blurred at the scene. “[A] patfrisk is permissible only where an officer has reasonable suspicion that the suspect is armed and dangerous,” and “general safety concerns without more will not justify a patfrisk.” Torres-Pagan, 484 Mass. at 36, 38 to 39. An exit order that was lawful does not make the frisk that followed lawful.

Once the license and registration are produced and found in order, the occupants are ordinarily to be released promptly. Commonwealth v. Torres, 424 Mass. 153, 158 to 159 (1997). Exit orders and pretext searches are covered in more detail on the Massachusetts traffic stops, exit orders, and pretext searches page.

3. Did Anyone Consent?

Consent must be “unfettered by coercion, express or implied,” and it must be “something more than mere acquiescence to a claim of lawful authority.” Commonwealth v. Rogers, 444 Mass. 234, 236 to 238 (2005). The Commonwealth bears the burden of proving it. Failure to advise a person of the right to refuse is a factor bearing on voluntariness, though it is not determinative. Buckley, 478 Mass. at 878.

A person may decline a search. Saying so clearly and calmly, and not physically interfering if officers proceed anyway, preserves the argument for the courtroom where it belongs.

Consent given after an unlawful exit order or an unlawful search is a separate problem for the Commonwealth. In Robinson, consent given less than two minutes after an unlawful exit order, with no intervening circumstances, did not purge the taint, and the Supreme Judicial Court held the evidence should have been suppressed: “[e]ven where traditional markers of voluntariness are present, consent does not purge the taint of an unlawful seizure absent a meaningful break in the causal chain.”

In Commonwealth v. Dobson, No. SJC-13794 (Mass. July 17, 2026), the surrender of a car key was not valid consent where it was not attenuated from prior unlawful searches, and the Court confirmed that “the purpose and flagrancy of police misconduct are relevant to the validity of consent.”

4. What Ground Did Police Claim for the Search?

Massachusetts recognizes several exceptions to the warrant requirement. Each requires facts beyond the stop itself.

The automobile exception. Police may search a vehicle without a warrant where they have probable cause to believe it contains evidence of a crime or contraband. Carroll v. United States, 267 U.S. 132 (1925); Commonwealth v. Cast, 407 Mass. 891, 901 (1990).

Under art. 14, no separate exigency showing is required beyond the vehicle’s mobility: “when an automobile is stopped in a public place with probable cause, no more exigent circumstances are required by art. 14 beyond the inherent mobility of an automobile itself to justify a warrantless search of the vehicle.” Commonwealth v. Motta, 424 Mass. 117, 124 (1997).

What the exception does not provide is the probable cause. That must be developed through independent facts.

Search incident to arrest. Two limits apply, and the second is statutory rather than constitutional.

Under Arizona v. Gant, 556 U.S. 332, 346 (2009), applied in Commonwealth v. Perkins, 465 Mass. 600, 605 (2013), police may search the passenger compartment incident to arrest only where the arrestee is unsecured and within reach of the compartment, or where it is reasonable to believe the vehicle contains evidence of the offense of arrest. In Perkins the evidence was suppressed because the arrestee was handcuffed outside the car and the arrest offense, unlicensed operation, could yield no evidence inside it.

Separately, M.G.L. c. 276, § 1 provides that a search incident to arrest “may be made only for the purposes of seizing fruits, instrumentalities, contraband and other evidence of the crime for which the arrest has been made, in order to prevent its destruction or concealment; and removing any weapons that the arrestee might use to resist arrest or effect his escape,” and that “[p]roperty seized as a result of a search in violation of the provisions of this paragraph shall not be admissible in evidence in criminal proceedings.”

A search conducted for an investigatory purpose unrelated to the crime of arrest is outside the statute. Commonwealth v. Blevines, 438 Mass. 604, 607 (2003), quoting Commonwealth v. Wilson, 389 Mass. 115, 118 (1983); reaffirmed in Dobson.

Plain view. Four requirements apply, and Massachusetts adds one the Fourth Amendment does not. The officer must be lawfully in a position to view the object, must have a lawful right of access to it, the incriminating character must be immediately apparent, and the officer must come across the object inadvertently. Commonwealth v. White, 469 Mass. 96, 102 (2014), quoting Commonwealth v. Sliech-Brodeur, 457 Mass. 300, 306 to 307 (2010); Commonwealth v. Balicki, 436 Mass. 1, 8 to 9 (2002).

The second requirement is the one that most often defeats a seizure. In Commonwealth v. Sheridan, 470 Mass. 752, 763 to 764 (2015), officers could see marijuana inside a vehicle from a lawful vantage point outside it, and the seizure still failed: “although the officers could see the marijuana from their lawful vantage point outside the minivan, they did not have a ‘lawful right to access’ it from that vantage point. To seize the marijuana, the police officers had to enter the minivan. Because the observation of a noncriminal quantity of marijuana alone did not give rise to probable cause that the vehicle contained evidence of a crime,” the plain view doctrine did not authorize the seizure.

Seeing an item through a window is not the same as being entitled to take it.

Consent. Discussed above.

Inventory search. Where a vehicle is lawfully impounded, officers may inventory its contents under the department’s written procedures. Commonwealth v. Ellerbe, 430 Mass. 769 (2000). Both the impoundment and the conduct of the search are separately reviewable. The full treatment, including the written-policy requirement, closed containers, roadside inventories, and when inventoried property becomes evidence, is on the illegal searches and seizures page.

5. What Did That Ground Permit Police to Search?

The scope of the search depends on the ground claimed, and the grounds differ sharply.

A probable-cause search under the automobile exception “extends to all containers, open or closed, found within” the vehicle. Cast, 407 Mass. at 908. A search incident to arrest under Gant is framed in terms of the passenger compartment, and is further limited by M.G.L. c. 276, § 1 to evidence of the crime of arrest and to weapons. Plain view authorizes seizure of the item observed, not a general search. An inventory authorizes what the written policy directs and no more.

The Appeals Court has equated Gant‘s “reasonable to believe” prong with probable cause and treated it as an application of the automobile exception, Commonwealth v. Starkweather, 79 Mass. App. Ct. 791, 796 to 797 (2011), while more recently noting “considerable uncertainty” over whether the standard is probable cause, reasonable suspicion, or something else, Commonwealth v. Williams, 104 Mass. App. Ct. 498, 507 n.4 (2024).

6. Was the Search Based Only on the Odor of Marijuana?

The most frequently litigated vehicle search issue in Massachusetts drug cases is the odor of marijuana, and the law has moved decisively.

Adults twenty-one and over may lawfully possess up to two ounces, or the equivalent amount of marijuana products as determined by the Cannabis Control Commission, outside a residence. G.L. c. 94G, § 7(a)(1), as amended by Chapter 65 of the Acts of 2026, effective April 19, 2026. Section 7(a)(2) permits up to ten ounces in a primary residence, and simple possession through three ounces outside the home is a civil offense.

In Commonwealth v. Cruz, 459 Mass. 459 (2011), the Supreme Judicial Court held that “without at least some other additional fact to bolster a reasonable suspicion of actual criminal activity, the odor of burnt marijuana alone cannot reasonably provide suspicion of criminal activity to justify an exit order.” 459 Mass. at 472. Articulable facts “must demonstrate a suspicion that the defendant possessed more than one ounce.” Id. at 476.

The Court extended the reasoning to unburnt marijuana and to the automobile exception. In Commonwealth v. Overmyer, 469 Mass. 16 (2014), it held that “such odor, standing alone, does not provide probable cause to search an automobile,” 469 Mass. at 23, reasoning that a human nose cannot reliably discern the presence of a criminal amount.

The odor cases above were decided under the one-ounce limit. Chapter 65 raised the numbers without changing the constitutional principle, so the quantity a fact pattern must suggest before odor or plain view supports criminal process is now larger. An adult may now possess two ounces outside the home, and simple possession through three ounces is civil rather than criminal.

In Commonwealth v. Craan, 469 Mass. 24, 30 to 38 (2014), it held that odor alone cannot support a warrantless search under the automobile exception, and rejected the Commonwealth’s fallback arguments based on a supposed duty to prevent future impaired driving and on federal drug law, holding that state decriminalization “curtail[ed] police authority to enforce the Federal prohibition.”

Commonwealth v. Rodriguez, 472 Mass. 767 (2015), addresses the stop rather than the exit order: “Because stops based on reasonable suspicion of a possible civil marijuana infraction do not promote highway safety and run contrary to the purposes of G. L. c. 94C, § 32L . . . [s]uch stops are unreasonable; therefore, the stop in this case violated art. 14.” 472 Mass. at 778.

Probable cause must come from independent facts: a large quantity in plain sight, packaging or scales consistent with distribution, admissions, or other concrete indications of a crime beyond personal use. Craan, 469 Mass. at 33 to 34; Sheridan, 470 Mass. at 761.

Legalization did not make marijuana irrelevant at a stop. Operating under the influence of marijuana remains a criminal offense, Commonwealth v. Gerhardt, 477 Mass. 775, 779 (2017), but Gerhardt sharply limits the Commonwealth’s proof: an officer may not testify that a driver passed or failed field sobriety tests, no lay or unqualified-officer opinion that a driver was under the influence of marijuana is admissible, and performance on those tests alone is insufficient to prove impairment, with a jury instruction required to that effect. 477 Mass. at 783, 785 to 787.

7. What Happens If a Judge Suppresses the Evidence?

A motion to suppress is litigated at an evidentiary hearing before a judge, ordinarily before trial. On a warrantless search the Commonwealth bears the burden of proving that the search fell within an exception. Commonwealth v. Antobenedetto, 366 Mass. 51, 57 (1974); Commonwealth v. Roderick, 490 Mass. 669, 672 (2022). The defendant has an initial burden of establishing standing and setting out the facts supporting the motion, and the judge’s credibility findings control what happens next.

If the motion is allowed, the evidence obtained through the unlawful search is excluded from the Commonwealth’s case. That is not the same as dismissal, and it does not end the case automatically. The Commonwealth has a statutory right to appeal an order allowing suppression. G.L. c. 278, § 28E. Where the suppressed evidence is the only proof of an element, the practical result is often that the Commonwealth cannot proceed, but that is a consequence rather than a rule.

Suppression also does not necessarily reach everything that followed. Evidence obtained after unlawful police conduct “does not automatically become sacred and inaccessible.” Commonwealth v. Fredette, 396 Mass. 455, 459 (1985).

Three exceptions apply: independent source, Commonwealth v. Cassino, 474 Mass. 85, 90 (2016); inevitable discovery, which requires the Commonwealth to prove that discovery was certain as a practical matter and that police did not act in bad faith or to evade constitutional requirements, Commonwealth v. O’Connor, 406 Mass. 112, 117 to 118 (1989); and attenuation, Commonwealth v. Fredericq, 482 Mass. 70, 81 (2019).

The question is not but-for causation but “whether . . . the evidence . . . has been come at by exploitation of that illegality or instead by means sufficiently distinguishable to be purged of the primary taint.” Fredericq, 482 Mass. at 81.

Since Commonwealth v. Guardado, 491 Mass. 666, 690 (2023), S.C., 493 Mass. 1 (2023), cert. denied, 144 S. Ct. 2683 (2024), the Commonwealth must prove beyond a reasonable doubt that the defendant did not possess a license to carry. That is an element, and it is separate from any suppression issue.

What to Do at the Stop

Provide the license and registration when asked. Decline a search clearly and without argument. Decline to answer questions about where you have been, whether you have been drinking, or what is in the car. Under the Fifth Amendment and art. 12 of the Massachusetts Declaration of Rights, a person is not required to answer. See your right to remain silent in Massachusetts.

Do not physically interfere if officers proceed over an objection. A judge decides the legality of the search later, in court.

Write down the reason the officer gave for the stop, what the officer said to justify the search, whether consent was requested and what was said in response, how long the stop lasted, and how many officers were present. Those facts are the foundation of the motion.

Attorney Joe Serpa has practiced Massachusetts criminal defense since 1995 and has litigated motions to suppress vehicle searches in the District Courts and the Boston Municipal Court. Serpa Law Office can be reached at 617.936.0201 for a free and confidential consultation. The Boston office is at 20 Park Plaza #400A. The Quincy Office is at 500 Victory Road, Suite 400A. See also illegal searches and seizures in Massachusetts and Massachusetts drug crimes defense.

Three situations are frequently run together, and they are governed by different rules. Declining to give a passcode to an officer is one thing. Refusing consent to a search is a second. Disobeying a court order compelling entry of a passcode is a third. This post separates them.

Three Situations, Three Different Rules

An officer asks for the passcode. A police request is not a court order. There is no obligation to answer, and no Massachusetts statute makes the refusal a crime. Article 12 provides a further protection: evidence of a defendant’s outright refusal to comply with a police request generally may not be admitted as consciousness of guilt, because “in so refusing a defendant furnishes evidence against himself.” Commonwealth v. Conkey, 430 Mass. 139, 142 to 143 (1999). Accord Commonwealth v. Hinckley, 422 Mass. 261, 264 (1996). The refusal is not supposed to be used against the person who made it.

An officer asks to search the device. That is a consent question under the Fourth Amendment and art. 14, not a self-incrimination question. Consent must be voluntary, and the Commonwealth bears the burden of proving it. A person may decline.

A judge orders decryption. That is where the constitutional analysis below applies, and where the consequences of refusal are real.

The Testimonial Act Doctrine

The Fifth Amendment privilege protects a person from being compelled to make testimonial communications that are incriminating. The privilege requires all three: the communication must be testimonial, incriminating, and compelled.

The United States Supreme Court established in Fisher v. United States, 425 U.S. 391 (1976), that the act of producing evidence can itself be testimonial, because production concedes that the item exists, that the person producing it possesses or controls it, and that it is authentic. Where “[t]he existence and location of the papers are a foregone conclusion and the taxpayer adds little or nothing to the sum total of the Government’s information by conceding that he in fact has the papers,” the act is not protected. 425 U.S. at 411.

The Court applied the same framework in United States v. Hubbell, 530 U.S. 27 (2000), rejecting a compelled production where the government “ha[d] not shown that it had any prior knowledge of either the existence or the whereabouts” of the documents. 530 U.S. at 45.

In Commonwealth v. Gelfgatt, 468 Mass. 512 (2014), the Supreme Judicial Court observed that entering an encryption key “would appear, at first blush, to be a testimonial communication that triggers Fifth Amendment protection,” and that the act “would be a communication of his knowledge about particular facts.” It then held that on the record before it, the facts conveyed were foregone conclusions, and “the act of decryption is not a testimonial communication that is protected by the Fifth Amendment.”

Gelfgatt is the decision that permits compelled decryption in Massachusetts. An order compelling a defendant to unlock a device is called a Gelfgatt order for that reason.

Gelfgatt also sets out what the government must already know for the exception to apply: “(1) the existence of the evidence demanded; (2) the possession or control of that evidence by the defendant; and (3) the authenticity of the evidence.” 468 Mass. at 524.

The Foregone Conclusion Standard After Jones

In Gelfgatt the exception applied because the defendant had already told investigators that the seized computers were his, that their contents were encrypted, and that he was able to decrypt them. His compelled entry of the key told the Commonwealth nothing new. The decision left open how certain the government must be.

The Supreme Judicial Court answered that in Commonwealth v. Jones, 481 Mass. 540 (2019). Where the Commonwealth seeks a Gelfgatt order, “art. 12 requires that, for the foregone conclusion to apply, the Commonwealth must prove beyond a reasonable doubt that the defendant knows the password.” That is the highest standard of proof our courts apply to a factual question.

The Court rejected the Commonwealth’s argument that clear and convincing evidence should suffice, and declined to speculate about the federal standard: “[w]hatever the standard under the Fifth Amendment may be, requiring the Commonwealth to bear this high burden is necessary to ensure that the art. 12 rights of defendants are adequately protected.”

Three points from Jones matter in practice, and one of them is routinely given away.

The fact to be proved is knowledge, not ownership. “[T]he Commonwealth is only required to establish the defendant’s knowledge of the password beyond a reasonable doubt, not his ownership or exclusive control of the LG phone . . . exclusive control of the phone is not required.” In Jones the defendant’s possession of the phone at arrest, his statement that the number was his, subscriber and cell site records, and a witness who reached him at that number together satisfied the burden even though others may also have used the device.

The order permits entry, not disclosure. This is the limitation most often lost in summaries of the case, and it favors the defense. The Court wrote: “We need not, and do not, resolve this distinction here, and our decision is therefore limited to only the physical entry of the password by the defendant, as we required in Gelfgatt. The defendant may therefore only be compelled to enter the password to the LG phone, not disclose it.” Whether the foregone conclusion doctrine would permit compelled oral or written disclosure of a passcode is an open question.

A denial is not necessarily the end for the Commonwealth. Jones also holds that “a judge acting on a renewed Gelfgatt motion may consider additional information without first finding that it was not known or not reasonably available at the time of the first filing.” Counsel should expect a second application supported by new material.

Justice Lenk wrote separately, taking the view that the government should also be required to demonstrate, beyond a reasonable doubt, “that the government already knows, with reasonable particularity, the existence and location of relevant, incriminating evidence it expects to find on that device.” That is a concurrence rather than the holding. The Court’s standard is knowledge of the passcode.

Unlocking is also only the beginning. The search that follows must comply with the warrant requirements set out in the guide to digital search warrants for phones and computers.

Biometric Unlocking

The analysis for biometric unlocking, meaning Touch ID, Face ID, and fingerprint scanners, is distinct from the passcode analysis, and it is unsettled.

No Massachusetts appellate court has decided it. The Supreme Judicial Court has not addressed whether the Fifth Amendment or art. 12 permits compelled biometric unlocking, and neither has the Appeals Court. Every reported decision on the question is federal, and no federal decision binds a Massachusetts state court on this issue.

The federal decisions reached different results on materially different facts. In United States v. Payne, 99 F.4th 495 (9th Cir. 2024), the Ninth Circuit held that “the compelled use of a biometric to unlock an electronic device was not testimonial because it required no cognitive exertion,” where an officer physically applied a parolee’s thumb to the device and the parolee was subject to a suspicionless general search condition.

The panel added a limit that is regularly omitted: “[o]ur opinion should not be read to extend to all instances where a biometric is used to unlock an electronic device. Indeed, the outcome on the testimonial prong may have been different had Officer Coddington required Payne to independently select the finger that he placed on the phone.”

In United States v. Brown, 125 F.4th 1186 (D.C. Cir. 2025), the District of Columbia Circuit held that the compelled opening of a cellphone was testimonial where an agent ordered a co-defendant to open the phone himself and he complied. The disagreement is real, but the weight of it sits in the district courts, and the facts differ in a way that may explain the outcomes.

A Massachusetts defendant should not assume that art. 12’s greater breadth will resolve this question in his favor. Article 12 protects a person from being compelled to “furnish evidence” rather than to be “a witness against” himself, and the Supreme Judicial Court has “consistently held that art. 12 requires a broader interpretation” than the Fifth Amendment. Jones, quoting Opinion of the Justices, 412 Mass. 1201, 1210 (1992), and Attorney Gen. v. Colleton, 387 Mass. 790, 796 (1982).

But Gelfgatt contains a qualifier that cuts the other way: although art. 12 demands more expansive protection, “it does not change the classification of evidence to which the privilege applies. Only that genre of evidence having a testimonial or communicative nature is protected under the privilege against self-incrimination,” quoting Commonwealth v. Burgess, 426 Mass. 206, 211 (1997).

The Supreme Judicial Court has placed fingerprints on the unprotected side of that line in other settings. “If evidence sought is real or physical evidence, such as hair and blood samples, voice exemplars, fingerprints, lineups, sobriety tests, or breathalyzer tests, art. 12 does not protect a person from having to provide such evidence.” Conkey, 430 Mass. at 142. Accord Commonwealth v. Lydon, 413 Mass. 309, 313 to 314 (1992).

A device that opens only with a memorized passcode stands on the strongest available footing. A device that opens with a face or a fingerprint may not.

What Happens if You Refuse

Refusing a police request is not a crime, and under Conkey the refusal generally may not be offered as consciousness of guilt.

A court order is different.

If a judge issues a Gelfgatt order and the defendant does not comply, the defendant may be held in civil contempt and confined until he complies. Contempt of that kind is civil because the contemnor holds “the keys of [his] prison in [his] own pocket,” and civil contempt requires “a clear and undoubted disobedience of a clear and unequivocal command.” Birchall, petitioner, 454 Mass. 837, 848, 851 (2009). A defendant who says he cannot comply bears the burden of proving it. Mahoney v. Commonwealth, 415 Mass. 278, 286 (1993).

The Appeals Court addressed the consequence of that confinement as a matter of first impression in 2026. In Commonwealth v. Theogene, No. 24-P-1395 (Mass. App. Ct. Apr. 9, 2026), a defendant ordered to input the PIN to a seized iPhone refused and was held in contempt “until such time as he complies.” He was confined for months.

The Appeals Court held that he “was not entitled to receive jail credit pursuant to G. L. c. 279, § 33A, for the time he was held in custody for civil contempt prior to sentencing,” reasoning that crediting the time “would undermine a judge’s inherent contempt power to coerce a contemnor to obey a court order.”

Time served on a coercive contempt does not count toward the eventual sentence.

The correct response to a Gelfgatt order is litigation rather than defiance. Whether the order is constitutional, and whether the Commonwealth proved knowledge of the passcode beyond a reasonable doubt as Jones requires, is challenged through motion practice before compliance.

If a Passcode Has Already Been Given

A passcode volunteered to an officer, without a court order and without compulsion, is not a compelled testimonial act at all, because the privilege applies only to communications that are compelled. What it is instead is consent, and the consequences follow the law of consent rather than the law of self-incrimination.

Consent can still be challenged: it may have been involuntary, exceeded in scope, or the product of an unlawful seizure that preceded it. In Commonwealth v. Fencher, 95 Mass. App. Ct. 618 (2019), a defendant “consented to the search of her cell phone and provided passwords to both the phone and her Snapchat account,” and the motion judge allowed suppression on taint grounds; the Appeals Court reversed only because the seizure turned out to be supported by probable cause and the consent was found free and voluntary. The motion was available and nearly succeeded.

Consent is also given item by item. In the same interview in Fencher, the defendant declined consent to search a vehicle. Agreeing to one search is not agreeing to all of them.

Anyone who has already given a passcode should have counsel assess what was extracted, whether the consent was valid and how far it went, and whether the seizure that preceded it was lawful.

Do Not Delete Anything

Do not attempt to wipe or delete data from a device that is in law enforcement custody or subject to a preservation order.

The tampering statute, M.G.L. c. 268, § 13E, applies to whoever “alters, destroys, mutilates, or conceals a record, document, or other object, or attempts to do so, with the intent to impair the record, document or object’s integrity or availability for use in an official proceeding, whether or not the proceeding is pending at that time.” The specific intent is an element.

The penalty depends on the proceeding: where the official proceeding involves a violation of a criminal statute, the maximum is a fine of up to $25,000 and up to ten years in state prison; otherwise the maximum is a fine of up to $10,000 and up to five years. Both tiers cap house of correction time at two and one half years.

Practical Guidance

Do not provide a passcode to an officer without first consulting counsel. A police request is not a court order, and there is a right to decline and to require law enforcement to seek judicial authorization.

Do not provide a passcode in exchange for a promise of leniency or a representation that it will help the case. Those representations do not bind the government.

Do not delete or remotely wipe anything.

If a passcode has already been given, contact counsel promptly to assess what was extracted and what remains challengeable.

Key Points

Compelled entry of a passcode is testimonial in nature, but Commonwealth v. Gelfgatt, 468 Mass. 512 (2014), held that the foregone conclusion doctrine permitted the compelled decryption there and authorizes the order that now bears its name.

Under Commonwealth v. Jones, 481 Mass. 540 (2019), art. 12 requires the Commonwealth to prove beyond a reasonable doubt that the defendant knows the passcode. The fact to be proved is knowledge, not ownership or exclusive control, and the order permits only entry of the passcode, not its disclosure.

No Massachusetts appellate court has decided whether compelled biometric unlocking is permitted. The federal decisions differ on materially different facts and none binds a Massachusetts court. Article 12’s greater breadth does not extend the privilege to evidence that is not testimonial, and Massachusetts treats fingerprints as physical evidence in other settings. Commonwealth v. Conkey, 430 Mass. 139 (1999).

Refusing a police request is not a crime, and the refusal generally may not be used as consciousness of guilt. Conkey.

Refusing a court order can result in coercive civil confinement, and under Commonwealth v. Theogene, No. 24-P-1395 (Mass. App. Ct. Apr. 9, 2026), that time does not count toward the eventual sentence.

A passcode volunteered without compulsion is a consent question rather than a self-incrimination question, and consent may still be challenged as involuntary, exceeded, or tainted by an unlawful seizure. Commonwealth v. Fencher, 95 Mass. App. Ct. 618 (2019).

Deleting material from a seized device can support a charge under M.G.L. c. 268, § 13E, which requires proof of intent to impair the item’s integrity or availability for use in an official proceeding.

Attorney Joe Serpa has practiced Massachusetts criminal defense since 1995 and litigates compelled decryption and device search motions. Serpa Law Office can be reached at 617.936.0201 for a free and confidential consultation. The Boston office is at 20 Park Plaza #400A. The Quincy Office is at 500 Victory Road, Suite 400A. See also phone, computer, and digital device searches in Massachusetts and your right to remain silent.

June 2026. Updated July 2026 for the Supreme Court’s geofence ruling in Chatrie v. United States.

A Massachusetts search warrant for a digital device, whether a smartphone, laptop, tablet, or cloud storage account, is not a general license to search a defendant’s entire digital life. Under the Fourth Amendment to the United States Constitution, Article 14 of the Massachusetts Declaration of Rights, and the developing body of Massachusetts case law governing illegal searches and seizures, law enforcement must satisfy specific, narrowly defined requirements before a judge will authorize a warrant. Officers must then execute that warrant within its precise boundaries. A digital search that exceeds those boundaries is unconstitutional, and the evidence it produces is suppressible.

The Constitutional Framework: Riley v. California and Beyond

The foundational constitutional protection governing digital device searches in Massachusetts derives from the United States Supreme Court’s ruling in Riley v. California, 573 U.S. 373 (2014), which held that law enforcement must obtain a warrant before searching the digital contents of a cell phone seized incident to arrest. The Court recognized that a modern smartphone contains more personal information than any physical space subject to a traditional search. Financial records, medical history, private communications, location data, and years of photographs all live on a single device. The historical rationales for the search-incident-to-arrest exception do not extend to this category of evidence.

In Massachusetts, Riley is supplemented by Article 14 of the Declaration of Rights, which the Supreme Judicial Court has consistently interpreted to provide broader privacy protections than the Fourth Amendment in certain contexts. In Commonwealth v. Augustine, 467 Mass. 230 (2014), the SJC required a warrant for historical cell site location information four years before Carpenter v. United States, 585 U.S. 296 (2018), reached the same result under the Fourth Amendment. Massachusetts defendants facing digital searches can therefore assert both federal and state constitutional challenges simultaneously.

A warrant to search a phone is also not an order to unlock it. Compelled passcodes raise separate self-incrimination questions, which we address in our post on whether you must give police your iPhone passcode in Massachusetts.

What Must Be in a Massachusetts Digital Search Warrant Affidavit

To obtain a warrant to search a digital device in Massachusetts, law enforcement must submit a sworn affidavit to a magistrate or judge establishing three things with particularity.

Probable cause that a crime was committed. The affidavit must present specific, articulable facts rather than conclusions or hunches. Those facts must be sufficient to warrant a person of reasonable caution in believing that an offense has occurred. Probable cause demands more than bare suspicion, although it requires considerably less than proof beyond a reasonable doubt.

Probable cause that evidence of that crime will be found on the specific device. This is distinct from the first requirement. The affidavit must establish a nexus between the alleged criminal conduct and the particular device sought to be searched. A general assertion that people who commit crimes use phones is not a sufficient nexus. The Supreme Judicial Court enforced that rule in Commonwealth v. White, 475 Mass. 583 (2016), holding that an officer’s opinion that a phone is likely to contain evidence of the crime, standing alone, does not supply probable cause to seize the device. Owning a phone is not a nexus. The court reaffirmed the principle in Commonwealth v. Snow, 486 Mass. 582 (2021), warning that police may not rely on the ubiquitous presence of cell phones in daily life as a substitute for particularized information.

Timeliness matters as well. The facts in the affidavit must be fresh enough to support a belief that the evidence remains on the device, and stale information will defeat probable cause. Delay also cuts against the government after a seizure. In White, the SJC held that police who seize a phone without a warrant may hold it only for the short period needed to apply for one, and it found an undiligent 68 day delay unreasonable.

Particularity as to the data to be searched. Under the narrowly tailored standard developed in Massachusetts case law, a warrant authorizing a search of a digital device must specify the categories of data to be examined and must limit that examination to data connected to the offense under investigation. In Commonwealth v. Dorelas, 473 Mass. 496 (2016), the SJC held that searches of a smartphone must be conducted with special care and confined to the places within the device where the evidence sought may reasonably be found. In Snow, the court added that an initial cell phone warrant should presumptively contain a temporal restriction and should err on the side of narrowness. The Attorney General’s office instructs prosecutors and police in similar terms in its Massachusetts Digital Evidence Guide. A warrant that authorizes wholesale extraction of all data on a device without limitation is overbroad and constitutionally defective.

The “Overbreadth” Challenge: Digital Fishing Expeditions

Among the most powerful constitutional challenges to a digital device search in Massachusetts is the overbreadth challenge, the argument that the warrant authorized a broader search than the probable cause supported.

In practice, law enforcement frequently requests and receives warrants authorizing the extraction of the entire contents of a device, meaning all text messages, all emails, all photographs, all application data, all location history, and all browser history for all time periods. When the underlying criminal investigation concerns a discrete incident, such as a single alleged assault, a specific financial transaction, or a particular communication, such a warrant is not narrowly tailored to the offense. It is a digital fishing expedition, and Massachusetts courts have the authority to suppress the fruits of it.

A Motion to Suppress based on overbreadth challenges the warrant on its face and examines the underlying affidavit to determine whether the scope of the authorized search was proportionate to the probable cause presented. If the court finds the warrant overbroad, it must determine which of the extracted data, if any, falls within the constitutionally permissible scope, and it must suppress the rest. Our overview of the Massachusetts criminal process explains where a suppression motion fits in a prosecution.

The Two-Step Search Protocol and the Plain View Doctrine

Massachusetts courts have grappled with the question of what happens when law enforcement, in the course of executing a valid digital search warrant, discovers evidence of a separate crime not covered by the warrant. The traditional plain view doctrine permits warrantless seizure of contraband or evidence that an officer sees in plain view during a lawful search. That doctrine does not translate cleanly to the digital environment, where every file becomes potentially visible once an examiner opens the extraction.

Courts in Massachusetts and in the federal system have accordingly pushed law enforcement toward a two-step protocol for digital searches. First, a technical specialist performs a forensic extraction of the device’s data. Second, investigators conduct a separate review of that extracted data, and the review must stay within the categories the warrant authorizes. Evidence discovered outside those categories during the second step is not automatically admissible under the plain view doctrine and requires independent legal authorization before it can be used.

Update: The Supreme Court’s 2026 Chatrie Decision on Geofence Warrants

Digital search law moved again shortly after this post first appeared. On June 29, 2026, the United States Supreme Court held in Chatrie v. United States that a geofence demand, which compels a technology company to identify the devices present in a defined area around a crime scene, is a search under the Fourth Amendment. The Court concluded that people retain a reasonable expectation of privacy in their location history even when a third-party company stores it, building directly on Carpenter. Law enforcement must now justify geofence requests with a warrant supported by probable cause and drawn with particularity. Our full analysis of the Chatrie geofence decision covers its consequences for pending Massachusetts cases, and our guide to digital evidence in Massachusetts criminal cases covers the authentication of AI-generated material.

Cloud Storage, Third-Party Platforms, and the Stored Communications Act

A digital search warrant directed at a physical device is governed by Massachusetts constitutional law. A law enforcement demand for data held by a third-party platform, such as Apple iCloud, Google Drive, Meta, Snapchat, or a cellular carrier, is governed by a separate federal statutory framework, the Stored Communications Act (18 U.S.C. § 2701 et seq.).

Under the SCA, the legal process required to compel a third-party platform to disclose a user’s stored data varies depending on the type of data sought and its age. Certain categories of data require a full probable cause warrant. Others can be obtained with a court order under a lower standard, and still others with a mere subpoena. After Carpenter, historical cell site location information requires a warrant regardless of the statutory tier, and after Chatrie, the same is true of geofence location data. Under Article 14, automatic license plate reader data from a dense enough camera network is also a search. Commonwealth v. McCarthy, 484 Mass. 493 (2020). Massachusetts defendants whose data has been obtained from third-party platforms should have defense counsel examine the legal process used to compel that disclosure. If the government used a subpoena where a warrant was required, the data is suppressible.

Digital search warrants also arise with increasing frequency in cases charged under Massachusetts’s new nonconsensual intimate image statute, the Act to Prevent Abuse and Exploitation (Chapter 118, Acts of 2024), which took effect September 18, 2024, and under the federal TAKE IT DOWN Act, signed May 19, 2025. When a defendant is accused of distributing intimate images without consent under M.G.L. c. 265, § 43A, investigators typically seek warrants for the defendant’s phone, social media accounts, cloud storage, and messaging applications. The same particularity requirements that apply to all digital warrants under Riley v. California, 573 U.S. 373 (2014), apply in full to intimate image cases. A warrant that authorizes a general search of all device contents rather than specifying the categories of images, communications, or account data to be examined is constitutionally deficient. Defense counsel challenges the scope of digital warrants in intimate image cases through the same Motion to Suppress analysis that applies in drug, firearms, and fraud cases.

Key Takeaways

• Under Riley v. California and Article 14 of the Massachusetts Declaration of Rights, law enforcement must obtain a warrant before searching the digital contents of a seized phone or computer. The search-incident-to-arrest exception does not apply to digital devices. See our overview of Illegal Searches and Seizures in Massachusetts.
• A Massachusetts digital search warrant affidavit must establish probable cause that a crime occurred, a specific nexus between that crime and the particular device under Commonwealth v. White and Commonwealth v. Snow, and particularity as to the categories of data to be searched under Commonwealth v. Dorelas. General authorization to extract all device data is constitutionally overbroad.
• A warrant authorizing wholesale extraction of an entire device’s contents without limitation as to data type or time period invites suppression as a digital fishing expedition, and Snow directs that initial phone warrants should err on the side of temporal narrowness.
• The plain view doctrine does not automatically authorize the use of evidence of a separate crime discovered during a valid digital search. Evidence outside the scope of the warrant requires independent legal authorization.
• Data obtained from third-party platforms such as iCloud, Google, and cellular carriers is governed by the federal Stored Communications Act. The legal process used to compel disclosure must match the category of data sought, and data obtained with insufficient process is suppressible.
• After Chatrie v. United States, decided June 29, 2026, a geofence demand for location data is a Fourth Amendment search that requires a warrant.
• Never consent to a warrantless search of a digital device, because consent generally forfeits the constitutional challenges described above, and a person may decline to answer questions and refuse a search.

Serpa Law Office has defended Massachusetts criminal cases since 1995 and litigates digital suppression issues in courts throughout Greater Boston. Contact Serpa Law Office at 617.936.0201 or visit our Contact page for a confidential case review.

The Supreme Judicial Court returned to the timing question in August 2026 and upheld delays of 109 and 123 days. See how long the police may hold a phone before seeking a warrant.