Massachusetts OUI and Motor Vehicle Defense

Serpa Law Office represents people charged with operating under the influence and other criminal motor vehicle offenses in the District Court and Boston Municipal Court. The practice includes alcohol and drug OUI, criminal traffic citations, negligent or reckless operation, leaving the scene of an accident, license offenses, and motor vehicle homicide.

After an OUI arrest, the police ordinarily apply for a criminal complaint. The police officer takes the operator’s driver’s license and suspends it on behalf of the Registry of Motor Vehicles if the operator refuses a breath test, or if the breath test final analysis is .08 or greater. The arrest by itself does not suspend the license. A person later convicted of OUI, or whose case is continued without a finding, also loses the license for a period set by statute. Attorney Serpa handles the criminal case and advises clients about the Registry process but does not appear at Registry hearings.

This page identifies the principal issues in OUI and other criminal motor vehicle cases and links to the firm’s OUI resources. The steps a driver should take depend on the exact charge, the reason for any Registry action, and the case’s procedural stage.

Massachusetts OUI Defense

Massachusetts prosecutes OUI under G.L. c. 90, § 24. The Commonwealth may proceed on an impairment theory or, in an alcohol case, on a blood alcohol percentage of .08 or greater. Under either theory, the Commonwealth must prove that the defendant operated a motor vehicle on a way or in a place covered by the statute. In a drug OUI prosecution, the Commonwealth must prove impairment.

Defense counsel reviews the legal basis for the stop and exit order, then compares the officer’s account with video and other contemporaneous evidence. Counsel separately examines the foundation and weight of roadside sobriety exercises, the breath test final analysis, and hospital and toxicology records, together with witness testimony. The firm explains the elements, evidence, penalties, prior-offense rules, and trial issues in its Massachusetts OUI defense guide.

After an OUI Arrest

After booking, police ordinarily apply for a criminal complaint. The court then schedules an arraignment. After arraignment, counsel receives automatic discovery and may request additional evidence, file motions, negotiate with the prosecutor, or prepare for trial. The driver should keep the paperwork from the police and the Registry, because the paperwork contains the alleged offenses, court date, license action, and applicable deadlines.

A person who wants to contest a suspension for refusing a chemical test for alcohol must exercise the statutory Registry hearing right within 15 days of the suspension. The person must appear at the Registry for the hearing within the 15 days, because the Registry conducts refusal hearings on a walk-in basis. Mailing a hearing request within the 15 days is not enough to exercise the hearing right.

Different procedures govern a result-based suspension and a suspension arising from a later court disposition. The firm’s breathalyzer tests and license suspensions guide compares submitting to the breath test with refusing the breathalyzer and explains the consequences for drivers age 21 or older, drivers under 21, commercial drivers, and drivers with prior offenses.

Readers can find the sequence from booking through court and Registry review in the guide to what happens after a Massachusetts OUI arrest.

License Suspensions, Section 24D, and Hardship Licenses

In an alcohol OUI case, a refusal of a chemical test for alcohol, a breath test final analysis of .08 or more (.02 or more for a driver under 21), and a court disposition are different legal events. A driver may receive a separate suspension for a refusal, for a breath test final analysis at or above that level, and for a court disposition. Each suspension has its own duration, review procedure, and hardship rule.

A dismissal or not-guilty finding does not resolve every kind of suspension in the same manner. A driver receives the refusal suspension when the breath test operator records an incomplete breath test as a refusal under 501 CMR 2.16. The Massachusetts OUI license suspension and reinstatement guide separates refusal, result-based, and disposition-based license actions and explains their durations, review procedures, and restoration rules.

An immediate threat suspension is a fourth kind of suspension, separate from the refusal, result-based, and disposition-based suspensions. Under M.G.L. c. 90, § 22(a), police may ask the RMV to suspend a person’s license immediately and indefinitely based on alleged dangerous driving, even without an arrest, breathalyzer refusal, breath test final analysis of .08 or more, or court disposition.

A driver may face an immediate threat suspension in an OUI case begun by summons and in a case involving a serious crash, negligent or reckless operation, leaving the scene, or another motor vehicle offense. The Massachusetts immediate threat license suspension guide explains the police referral, RMV hearing, pending criminal case, records request, and appeals. The immediate threat FAQs give brief answers to questions about the immediate threat suspension.

The out-of-state driver’s license guide explains the separate consequences for drivers licensed in another state when the RMV suspends their right to operate in Massachusetts.

G.L. c. 90, § 24D provides an alternative disposition for an eligible person charged with alcohol OUI. Section 24D may also apply, once in a lifetime, to a person who has a single prior OUI conviction or assignment to an alcohol education program from 10 years or more before the new offense. An eligible person is not guaranteed a Section 24D disposition. The page on a first offense OUI in Massachusetts explains the Section 24D disposition, the license suspension, and the hardship license for a first offender.

After entering the required program, an otherwise eligible Section 24D participant may immediately apply for a discretionary hardship license covering the same-incident suspensions identified in the statute. A person subject to an unrelated suspension or revocation may be ineligible for the hardship license. The firm addresses eligibility, waiting periods, same-incident refusal relief, ignition-interlock requirements, documents, and appeals in its Massachusetts OUI hardship-license guide.

Readers can find concise answers about evidence, testing, penalties, Section 24D, license consequences, dispositions, and records in the Massachusetts OUI and DUI FAQs. The Massachusetts OUI hardship license FAQs address limited-license applications, eligibility documents, Registry hearings, denials, and appeals.

Other Criminal Motor Vehicle Charges

Chapter 90 contains several criminal offenses that may be charged with OUI or in a separate motor vehicle case. The Chapter 90 offenses have different elements, penalties, license consequences, and record effects. The Massachusetts motor vehicle crimes defense guide addresses the Chapter 90 charges together, including complaint procedure, evidence, penalties, Registry consequences, and defenses.

After an OUI arrest, the police can also bring a firearms charge. A driver who holds a license to carry and has a loaded gun in the vehicle can be charged with carrying a loaded firearm while under the influence under G.L. c. 269, § 10H. A person convicted under § 10H cannot hold a license to carry.

Negligent Operation and Reckless Operation

G.L. c. 90, § 24(2)(a) sets out negligent operation and reckless operation under different legal standards. In a negligent operation case, the judge or jury decides whether the driver failed to use reasonable care and whether the manner of operation might have endangered the public. Reckless operation requires conduct substantially more dangerous than ordinary negligence. A collision, an injury, or the way the police describe the driving does not by itself prove negligent operation or reckless operation.

The Commonwealth’s ability to prove the charged theory may depend on video, witness accounts, crash evidence, road and weather conditions, vehicle records, and the reason for the stop or complaint.

Leaving the Scene of an Accident

Separate provisions govern leaving the scene of property damage, personal injury, and death. Each provision requires proof that the driver knew of the collision or injury described by the applicable provision and went away without stopping to provide the required identifying information. The death provision also requires proof that the driver left to avoid prosecution or evade apprehension.

The duty to stop does not depend only on who was at fault for the collision. The question whether the evidence supports the charged offense commonly depends on identity, knowledge, causation, vehicle damage, video, witness accounts, repair records, and what the driver did after the incident.

Operating After Suspension or Revocation Under G.L. c. 90, § 23

Section 23 applies when Massachusetts suspended or revoked a license or right to operate, the Registry had not formally restored the right or issued a new license, and the person or an authorized recipient received the required notice. At trial on a Section 23 charge, the Commonwealth does not have to prove that the person drove on a public way. The penalty depends on the source of the suspension or revocation and the person’s prior Section 23 record. A judge must impose a sentence of incarceration on a person convicted of operating after certain OUI-related suspensions or revocations.

G.L. c. 90, § 21 authorizes the police to arrest a person for a Section 23 offense in the locations and under the officer-identification conditions specified in § 21. Police may instead use a Massachusetts Uniform Citation as an application for a criminal complaint. A driver who has a statutory right to a clerk-magistrate hearing on a citation may submit a written request for the hearing within four days. The operating-after-suspension defense guide explains notice, Registry proof, restoration, penalties, citation procedure, and defenses.

Unlicensed Operation Under G.L. c. 90, § 10

The ordinary first-paragraph Section 10 offense requires operation on a public way without a valid license, permit, or nonresident privilege that Massachusetts recognizes. The first-paragraph Section 10 offense is not limited to a person who never obtained a license. The prosecution may base a Section 10 charge on an expired license, the wrong license class, operation outside a restriction, or a disputed out-of-state or foreign-license privilege. A violation of the first paragraph of Section 10 is punishable by a fine. A separate paragraph of Section 10 addresses operation after suspension or revocation and incorporates the Section 23 penalties.

Police may also arrest a person for a first-paragraph Section 10 offense under G.L. c. 90, § 21 when the alleged operation occurred on a public way. Police may proceed by criminal citation instead. The unlicensed-operation defense guide explains the elements, license and residency rules, arrest, the four-day hearing request, citation timing, penalties, records, and defenses.

Motor Vehicle Homicide and Operating to Endanger

G.L. c. 90, § 24G defines distinct OUI, negligent, and reckless motor vehicle homicide offenses. The Commonwealth must prove that the charged operation caused the death and must also prove the elements required by the particular subsection. A fatal collision does not by itself establish intoxication, negligence, recklessness, or criminal causation.

Defense counsel separately reviews the vehicle and electronic data, crash reconstruction, road design, sight lines, medical evidence, toxicology, witness accounts, and the sequence of events before the collision.

The Massachusetts motor vehicle crimes FAQs give brief answers to questions about criminal citations, elements, clerk-magistrate hearings, license consequences, dispositions, and records.

Criminal Traffic Citations and Clerk-Magistrate Hearings

Many criminal motor-vehicle cases begin with a citation rather than an arrest. Under G.L. c. 90C, § 3, a person who was not arrested and is accused by citation of a misdemeanor with no accompanying felony generally may request a clerk-magistrate hearing before a complaint issues. Section 3 requires the written request within four days of the violation and does not describe the period as four business days. General rules for computing statutory time can affect a deadline that ends on a Sunday or legal holiday, but the driver should file the request immediately rather than rely on an extension.

The Massachusetts criminal traffic citation and four-day hearing guide explains how to respond to a citation, how mailed or delayed citations affect the deadline, and how the citation-defense requirements in G.L. c. 90C, § 2 operate.

At the clerk-magistrate hearing, the clerk-magistrate decides whether a criminal complaint should issue. The clerk-magistrate hearing is different from the noncriminal hearing used to contest a civil motor vehicle infraction. The citation may contain both criminal and civil allegations. The driver must respond to each part of the citation. A person arrested for the charged offense is ordinarily not entitled to the same pre-complaint hearing merely because the officer also issued a citation.

The Massachusetts clerk-magistrate hearing FAQs explain notice, evidence, counsel, records, and what happens after a clerk-magistrate denies a complaint application.

Licensing Rules for Temporary Visitors and People Who Move to Massachusetts

Students, exchange visitors, researchers, workers, and other people who come to Massachusetts temporarily may drive here on a valid license from their home state or country. A temporary visitor may drive on the home-state or home-country license throughout the temporary stay while keeping a permanent home elsewhere and intending to return there. G.L. c. 90, § 10.

The driver must carry the license. A driver whose license is not printed in English must also carry an international driving permit or another translation of the license that the Registry accepts. A person who moves to Massachusetts permanently or for an indefinite period must obtain a Massachusetts driver’s license before driving.

Police frequently issue unlicensed-operation charges after seeing a Massachusetts address, school identification card, local job, or vehicle kept here for months. A Massachusetts address, a school identification card, a local job, or a vehicle kept here for months does not establish that the driver moved to Massachusetts permanently or for an indefinite period. Commonwealth v. Chown, 459 Mass. 756, 763 to 767 (2011), requires the inquiry described in G.L. c. 90, § 3½, which ordinarily cannot be completed at the roadside. A driver who receives a criminal citation has four days to request a clerk-magistrate hearing under G.L. c. 90C, § 3.

Counsel can present the complete home, school, employment, license, vehicle, and travel records at the clerk-magistrate hearing before any complaint issues. A driver arrested under G.L. c. 90, § 21 does not receive a clerk-magistrate hearing and goes directly to arraignment. The court record of the arraignment remains even if the case is later dismissed.

In a criminal citation case without an arrest, counsel can present the complete license, residence, vehicle, and insurance record at a timely clerk-magistrate hearing before a complaint issues. The guides to Massachusetts driver’s-license rules for residents and nonresidents, international students, visitors, and Massachusetts driver’s licenses, unlicensed operation, and the international-student license FAQs address those rules in detail.

Evidence and Case Preparation

Defense counsel must identify the precise charge before deciding which evidence is relevant. To review an OUI allegation, counsel may need the video, the roadside instructions, the breath-test records, the medical evidence, and the certified prior record. The defense to a leaving-the-scene charge may depend on the proof of knowledge and identification. An operating-after-suspension prosecution may depend on the Registry history, the suspension source, restoration records, and proof of notice. An unlicensed-operation prosecution may depend on the license, permit, residency, vehicle, license-class, and nonresident-privilege records. A prosecution that alleges serious injury or death depends on the medical and causation evidence.

A motion to suppress addresses unlawfully obtained evidence, while a separate evidentiary motion may address scientific foundation, regulatory compliance, hearsay, or expert testimony. The Commonwealth may be unable to use evidence if a judge allows a motion to suppress or exclude that evidence. The Commonwealth may continue the prosecution after a judge allows the motion, if the remaining admissible evidence can still prove every element of the charged offense.

The article on how Massachusetts OUI cases are won at trial explains how counsel tests operation, location, impairment, breath-test evidence, observations, and credibility against the Commonwealth’s burden of proof.

The first-person account of how Attorney Serpa tries a Massachusetts OUI case after a breathalyzer refusal covers the motions in limine, the instruction on the absence of test evidence, cross-examination, and closing argument.

Collateral Consequences

An OUI or other criminal motor vehicle matter may affect employment, a commercial driver’s license, a professional license, immigration status, college or university enrollment, or insurance. The rule that governs each consequence may depend on an arrest, charge, admission, continuance without a finding, conviction, license action, or another precisely defined event.

Canada has treated impaired driving as serious criminality under section 36 of the Immigration and Refugee Protection Act since December 18, 2018. A Canadian border officer can refuse entry to a person with a Massachusetts OUI conviction and, in some cases, to a person with a pending charge or a continuance without a finding. The page on traveling to Canada after an OUI explains which Canadian rules apply to each outcome of a Massachusetts case.

U.S. Customs and Border Protection can deny a Global Entry application, or remove a member from the program, because of an OUI arrest, even before the OUI case ends. The page on Global Entry, NEXUS, and TSA PreCheck after an OUI explains what each federal agency does after an OUI arrest, a CWOF, and a conviction.

Before a disposition, counsel should identify the rules on collateral consequences that apply to the client. A result that limits one consequence may not resolve another consequence. A dismissed court case does not erase every police, court, Registry, or federal record.

Representation in Greater Boston

Attorney Serpa has represented defendants in Massachusetts criminal courts since 1995. The firm handles first and subsequent OUI charges, alcohol and drug allegations, and cases involving a refusal or a breath test final analysis. The firm also handles criminal traffic citations, clerk-magistrate hearings, and other serious motor vehicle prosecutions.

Contact Serpa Law Office at 617.936.0201 for a free, confidential consultation. The Boston office is at 20 Park Plaza, Suite 400A. The Quincy Office is at 500 Victory Road, Suite 400A.

Last Reviewed: August 2026