What a Massachusetts Judge Can and Cannot Decide in a Criminal Case

A Massachusetts judge decides the legal and procedural questions assigned to the judicial branch. The judge rules on motions, determines conditions of release, accepts or rejects pleas, presides over trials, and imposes sentences within the limits set by law. In a jury trial, however, the jury determines whether the Commonwealth proved each charge beyond a reasonable doubt.

Article 30 of the Massachusetts Declaration of Rights separates judicial power from legislative and executive power. The Massachusetts Legislature defines criminal offenses, assigns jurisdiction, and sets the punishments the courts may impose. The district attorney decides whether and how the Commonwealth will prosecute, including which charges to pursue and which plea terms to offer. A judge resolves legal challenges and imposes a lawful disposition but may not exercise either branch’s authority.

The Judge’s Authority in a Criminal Case

Two statutes give the trial courts their criminal jurisdiction. Under G.L. c. 212, § 6, the Superior Court has original jurisdiction of all crimes. A judge of that court may hear any criminal case the Commonwealth brings there.

Under G.L. c. 218, § 26, the District Court Department and the divisions of the Boston Municipal Court have original jurisdiction, concurrent with the Superior Court, over a defined group of offenses. That jurisdiction includes all misdemeanors except libels, all felonies punishable by imprisonment in state prison for not more than five years, and the additional offenses the section enumerates.

That jurisdictional division also limits sentencing authority. Only a Superior Court judge may impose a state prison sentence. The page on Massachusetts courts, state prison, and the house of correction explains the confinement options available in each court.

Article 30 states that the judicial department “shall never exercise the legislative and executive powers, or either of them.” The Supreme Judicial Court applies that clause to criminal cases directly. A judge who dismisses a legally adequate charge over the Commonwealth’s objection, without a legal basis, “usurps the decision-making authority constitutionally allocated to the executive branch.” Commonwealth v. Cheney, 440 Mass. 568, 574 (2003), quoting Commonwealth v. Gordon, 410 Mass. 498, 501 (1991).

The Constitution, statutes, court rules, controlling precedent, and valid exercises of inherent judicial authority define a judge’s power in a criminal case. Article 30 does not permit a judge to replace the prosecutor’s charging judgment with the judge’s own view that a legally valid prosecution is weak, sympathetic, or an unwise use of public resources.

Before the Complaint Issues

A judge may authorize a criminal complaint. Under Mass. R. Crim. P. 3 and G.L. c. 218, §§ 33 and 35, a clerk-magistrate, assistant clerk, or judge determines whether the application establishes probable cause to believe that the person named committed the charged offense. In most District Court and Boston Municipal Court cases, a clerk-magistrate makes that determination.

A judge may also conduct a hearing under G.L. c. 218, § 35A. When the person is not under arrest, the statute requires an opportunity to be heard on a misdemeanor application and on a felony application received from a law enforcement officer who requests a hearing. It also permits a hearing, in the court officer’s discretion, on a felony application not received from law enforcement. No hearing is required when there is an imminent threat of bodily injury, commission of a crime, or flight from Massachusetts. The clerk-magistrate hearing page explains who receives a hearing, and the page on what happens at a clerk-magistrate hearing describes the proceeding.

If a clerk-magistrate denies an application, the complainant may ask a judge to redetermine it. The judge may deny the request, review the existing record, or consider the application anew. By contrast, an accused person cannot obtain judicial redetermination after the clerk-magistrate authorizes a complaint. The accused must challenge the complaint through a motion to dismiss at or after arraignment. Commonwealth v. DiBennadetto, 436 Mass. 310, 313 to 314 (2002).

A judge cannot order the district attorney to prosecute a case. A judge also cannot bar a prosecution the district attorney has decided to bring on a legally valid complaint. Commonwealth v. Clerk-Magistrate of the West Roxbury Division of the District Court Department, 439 Mass. 352, 359 to 360 (2003).

In the Superior Court the case begins with an indictment. Twelve or more grand jurors return it after assistant district attorneys present the evidence under Mass. R. Crim. P. 5. A judge receives the indictment in open court. The page on indictments and grand juries covers that procedure.

Arraignment, Bail, and Pretrial Detention

At arraignment, the court reads the charges unless a represented defendant waives the reading, enters the defendant’s plea, gives the advisories required by law, addresses the right to counsel, and determines the conditions of release. The prosecutor and defense counsel present their positions, and the judge rules. Mass. R. Crim. P. 7(b).

Under G.L. c. 276, § 58, the judge admits the person to bail on personal recognizance without surety unless release on personal recognizance will not reasonably assure the person’s appearance before the court. The judge makes that determination in the exercise of discretion. Before arraignment, when the police hold a person at the station after an arrest, a bail commissioner or a clerk applies the same standard.

G.L. c. 276, § 58 requires the judge to consider, among other factors, the nature and circumstances of the charge, the potential penalty, family ties, financial resources and ability to post bail, employment, convictions, and failures to appear. If the amount set is likely to cause long-term pretrial detention because the person cannot pay it, the judge must make written or orally recorded findings explaining why neither affordable bail nor nonfinancial conditions will reasonably assure appearance, how the amount was calculated, and why the Commonwealth’s interest in bail outweighs the likely harm of detention to the person and immediate family or dependents.

A judge may not use an unaffordable bail amount to detain a person because of alleged dangerousness. Brangan v. Commonwealth, 477 Mass. 691 (2017). A judge may impose lawful nonfinancial release conditions to address safety. If the Commonwealth seeks detention on dangerousness grounds, it must use the separate G.L. c. 276, § 58A procedure.

In the Superior Court, a justice of the Superior Court, the clerk of courts, or a bail commissioner appointed by the Superior Court admits a person to bail under G.L. c. 276, § 57. A person whom a District Court judge declines to release on personal recognizance may petition the Superior Court for review of the order. The Superior Court hears that petition, except in unusual circumstances, on the same day it is filed.

Pretrial detention on dangerousness follows its own procedure. The assistant district attorney files the motion under G.L. c. 276, § 58A. The judge holds a dangerousness hearing at which the person has the right to counsel, to testify, to present witnesses, and to cross-examine the witnesses who appear.

The judge orders detention only on a finding, by clear and convincing evidence, that no conditions of release will reasonably assure the safety of any other person or the community. The order must include written findings of fact and a written statement of reasons. Absent good cause, detention under G.L. c. 276, § 58A may not exceed 120 days in the District Court or 180 days in the Superior Court, excluding any period of delay defined by Mass. R. Crim. P. 36(b)(2).

The Motions a Judge Decides Before Trial

A judge decides motions to suppress. The governing law depends on the evidence challenged. A search or seizure may implicate Article 14 and the Fourth Amendment, while a statement may implicate Article 12, the Fifth Amendment, and the requirements of Miranda v. Arizona. When disputed material facts require an evidentiary hearing, the judge hears evidence, makes findings, and rules. The page on illegal searches and seizures explains the search-and-seizure doctrines.

Suppression is the exclusion of evidence from the trial. It is not a dismissal. Where the Commonwealth still holds enough admissible proof after an order of suppression, the prosecution continues.

A judge decides motions to dismiss. The available grounds differ between complaints in the District Court or Boston Municipal Court and indictments in the Superior Court. The next two sections address those courts separately. The page on how Massachusetts criminal cases get dismissed explains the District Court and Boston Municipal Court motion practice in greater detail.

Discovery under Rule 14 is largely automatic. Under Mass. R. Crim. P. 14(b) and (c), the prosecutor must provide the relevant listed material in the prosecutor’s possession at arraignment to the extent then available and must provide the material then available to the prosecution team by the first pretrial conference. If the prosecution does not comply, the defense may move to compel production or seek sanctions under Rule 14.2(j), and the judge decides the appropriate remedial order.

Judges also decide motions in limine and motions to sever defendants or counts. The page on Massachusetts criminal trial motion practice explains how counsel presents those motions. Attorney Joe Serpa describes how he researches, writes, and argues motions to suppress and dismiss in a separate post.

What a Judge Cannot Do With the Charge

A judge cannot dismiss a legally adequate charge over the Commonwealth’s objection before a verdict, a finding, or a plea, on the reasoning that dismissal would serve the interests of public justice. In Cheney a Superior Court judge dismissed legally adequate indictments for that reason. The Supreme Judicial Court held that Article 30 does not permit the dismissal. 440 Mass. at 568, 574 to 575.

A judge cannot enter a nolle prosequi. That declaration belongs to the prosecuting attorney under Mass. R. Crim. P. 16(a). Once the Commonwealth has begun a prosecution, “the decision to nol pros a criminal case is within the discretion of the executive branch of government, free from judicial intervention.” Cheney, 440 Mass. at 574, quoting Gordon, 410 Mass. at 500.

A judge cannot reduce the charge on a plea without the Commonwealth’s agreement. A judge who accepts a plea to a lesser offense than the one charged, over the Commonwealth’s objection, exercises a charging power that Article 30 reserves to the prosecutor. Commonwealth v. Pelletier, 449 Mass. 392, 398 to 399 (2007); Gordon, 410 Mass. at 498.

A judge cannot order the district attorney to seek an indictment, to bring a different offense, or to make a particular plea offer.

Grounds for Dismissal in the District Court and Boston Municipal Court

A judge may dismiss a complaint the clerk-magistrate issued without probable cause. The judge decides that motion on the application and the materials before the magistrate, without a new evidentiary hearing. DiBennadetto, 436 Mass. at 313 to 314.

When § 35A required a hearing and the accused did not receive one, a judge may dismiss the complaint without prejudice. The Commonwealth may begin the complaint process again and provide the required hearing. Commonwealth v. Lyons, 397 Mass. 644, 647 to 648 (1986); Cabrera v. Commonwealth, 496 Mass. 179 (2025).

A judge may dismiss where a materially misleading presentation or a procedural violation affected the integrity of the complaint proceeding.

A judge may dismiss where a police officer did not give a motor vehicle citation at the time and place of the violation and no exception in G.L. c. 90C, § 2 applies. A judge must dismiss with prejudice where the Commonwealth did not bring the defendant to trial within twelve months of the return day, after the periods Mass. R. Crim. P. 36(b) excludes are subtracted.

The page on dismissal and not guilty outcomes covers what each of those endings leaves on the record.

Grounds for Dismissal in the Superior Court

A judge may dismiss an indictment where the grand jury heard insufficient evidence to establish probable cause. Cheney, 440 Mass. at 575 n.12, citing Commonwealth v. McCarthy, 385 Mass. 160, 163 (1982).

A judge may dismiss an indictment on the same speedy trial reasoning that applies in the District Court. Mass. R. Crim. P. 36(b) governs both courts.

A judge may not dismiss a legally adequate indictment over the Commonwealth’s objection before a verdict, a finding, or a plea. Cheney, 440 Mass. at 574 to 575.

The Plea

The judge decides whether to accept a plea. Under Mass. R. Crim. P. 12(c) the judge conducts a colloquy, informs the defendant of the maximum possible sentence and of the rights waived, and hears the prosecutor state the factual basis of the charge. The judge accepts the plea only on a finding that the defendant makes it voluntarily and with an understanding of the nature of the charge and its consequences. The judge must also find that an adequate factual basis exists.

Under G.L. c. 278, § 29D the judge must advise the defendant that the plea may have the consequences of deportation, exclusion from admission to the United States, or denial of naturalization. Defense counsel has a separate duty to advise a noncitizen client of the immigration consequences of a plea.

Different limits apply if the parties have no agreed recommendation. In the District Court, Boston Municipal Court, and Juvenile Court, the defendant may withdraw the plea or admission if the judge intends to exceed the defendant’s requested disposition. In the Superior Court, the defendant may withdraw if the judge intends to exceed the prosecutor’s recommendation. Rule 12(c)(6)(B) requires the judge to give notice on the record and an opportunity to withdraw before exceeding the applicable limit.

A plea agreement that includes both a specific disposition and a charge concession binds the judge to impose the agreed sentence only if the judge accepts the agreement and the plea. It does not bind the judge to recommended probation conditions. If the judge rejects the agreement, the judge must allow either party to withdraw from it and must allow the defendant to withdraw the plea or admission. Rule 12(b)(5)(A), (d)(4), and (d)(6).

In the District Court, the Boston Municipal Court, and the Juvenile Court, a judge may accept a tendered plea over the Commonwealth’s objection. G.L. c. 278, § 18 permits the defendant to request a continuance without a finding to a date certain, with dismissal on compliance with conditions. The judge may allow that request unless a statute prohibits the disposition for the offense.

The Supreme Judicial Court upheld § 18 against a separation of powers challenge in Commonwealth v. Pyles, 423 Mass. 717 (1996), as the court explained in Cheney, 440 Mass. at 570 to 571.

Section 18 does not apply in the Superior Court. A Superior Court judge who has accepted a guilty plea may nonetheless continue the indictment without a finding on conditions and dismiss it on compliance, over the Commonwealth’s objection, where no statute prohibits that disposition. That disposition is not a nolle prosequi and does not infringe the executive power. Commonwealth v. Powell, 453 Mass. 320, 323 to 327 (2009). The Commonwealth may appeal the disposition when the judge imposes it. Id. at 327.

The Trial

A jury returns a verdict of guilty or not guilty. In a jury-waived trial, the judge enters a finding of guilty or not guilty.

The defendant chooses between the two. Under Mass. R. Crim. P. 19(a) the defendant may waive the right to trial by jury, provided that the judge determines after a colloquy that the waiver is knowing and voluntary. The defendant signs a written waiver, which the clerk files with the court. The judge may refuse to approve the waiver for any good and sufficient reason, given in open court and on the record.

During trial, the judge resolves evidentiary objections, decides the admissibility of disputed exhibits, and instructs the jury on the law. The pages on jury selection, opening statements and closing arguments, and cross-examination explain those stages.

The judge, not the prosecutor and not the jury, decides whether the evidence is legally sufficient to go to the jury. A required finding of not guilty under Mass. R. Crim. P. 25 is an acquittal rather than a dismissal. Its own page covers the standard and the timing.

The judge decides whether to declare a mistrial. That decision has consequences for whether the Commonwealth may try the case again, which the pages on a mistrial and retrial and on double jeopardy cover.

When the defense raises lack of criminal responsibility, the judge decides which evidence is admissible and instructs the jury on the governing law. The criminal responsibility page explains that defense.

The Sentence

The Legislature establishes the authorized penalties, the prosecutor chooses the charges the Commonwealth will pursue, and the judge selects a lawful sentence for the offense established by the verdict, finding, plea, or admission. A prosecutor’s recommendation alone does not bind the judge. A plea agreement that includes both a specific disposition and a charge concession, however, binds the judge to the agreed sentence after the judge accepts the agreement and the plea, subject to Rule 12’s treatment of probation conditions.

Whether a statutory minimum term may be suspended depends on the words of the particular statute rather than on the phrase “not less than” standing alone. In Commonwealth v. Lightfoot, 391 Mass. 718, 721 (1984), the Supreme Judicial Court read the express language of G.L. c. 272, § 7 barring suspension and barring eligibility for probation, parole, and furlough. That express language, not the minimum term by itself, made the two years a term the defendant had to serve.

Only the Superior Court may impose a state prison sentence. The page on sentencing in the District Court and the Boston Municipal Court explains the sentences and other dispositions those courts may impose.

Under Mass. R. Crim. P. 28, a verdict or finding of guilty or not guilty is rendered in open court and entered on the docket. Before sentencing, the probation department reports the defendant’s prior criminal case record, excluding cases in which the defendant was found not guilty. The judge must allow the defendant or defense counsel to speak and present information in mitigation of punishment before imposing sentence.

Post-Sentence Motions

Mass. R. Crim. P. 29 provides two grounds for revising or revoking a disposition, each governed by a 60-day period. For an illegal disposition, the trial judge may act within 60 days of the disposition, either on the judge’s own motion or on the prosecutor’s written motion. When justice may not have been done, the judge may act within 60 days of the disposition, issuance of an appellate rescript on direct review, or disposition of criminal charges against a codefendant, either on the judge’s own motion or on the defendant’s written motion.

Under Mass. R. Crim. P. 30(a), a person imprisoned or otherwise restrained under a criminal conviction may file a motion at any time to seek release or correction of the sentence on the ground that the confinement or restraint violates federal or Massachusetts law. The page on correcting a Massachusetts criminal sentence explains Rules 29 and 30.

Under Mass. R. Crim. P. 30(b) a judge may grant a new trial at any time it appears that justice may not have been done. Commonwealth v. Scott, 467 Mass. 336, 344 (2014). A motion to withdraw a guilty plea is the defendant’s motion, treated as a motion for a new trial under that rule.

Probation Conditions and Violation Proceedings

The judge sets the conditions of probation. The probation department supervises compliance and brings an alleged violation back to court. The judge decides whether the defendant violated a condition and what disposition follows, including whether to impose a sentence that was suspended.

The pages on a Massachusetts probation violation, on defenses to a probation violation, and on a violation of a continuance without a finding cover those hearings.

Who Makes Each Decision

A clerk-magistrate, assistant clerk, or judge may authorize a complaint, and 12 or more grand jurors return an indictment. At arraignment, a judge decides release. Before trial, the judge rules on suppression, dismissal, discovery, severance, and evidentiary motions. The judge decides whether to accept a plea, presides over a jury or jury-waived trial, imposes a lawful sentence, and decides post-sentence motions and probation violations.

The district attorney retains executive authority over which charges the Commonwealth will pursue, whether to seek an indictment, whether to enter a nolle prosequi, whether to file a dangerousness motion, and what plea terms or sentence to recommend. A jury returns the verdict in a jury trial; a judge enters the finding in a jury-waived trial. The Massachusetts criminal process page explains when each decision arises.

Where These Decisions Are Made

Attorney Joe Serpa appears before judges of the District Court, the Boston Municipal Court, and the Superior Court in Suffolk, Norfolk, Middlesex, Essex, Worcester, and Bristol counties.

In Suffolk County the District Court decisions described above are made in the eight divisions of the Boston Municipal Court and in the Chelsea District Court. The district courts of Norfolk, Middlesex, Essex, Worcester, and Bristol counties each have their own page. The Superior Court decisions are made in the Suffolk, Norfolk, Middlesex, Essex, Worcester, and Bristol Superior Courts.

To discuss a Massachusetts criminal case, contact Serpa Law Office at 617.936.0201.