The Massachusetts Rules of Evidence are not, strictly speaking, rules at all. Unlike the federal system and most other states, Massachusetts has never enacted an evidence code. What governs a Massachusetts trial is a body of Supreme Judicial Court decisions, statutes, and constitutional protections built up over centuries. The SJC Advisory Committee on Massachusetts Evidence Law gathers those authorities into a single reference document, the Massachusetts Guide to Evidence, organized along the lines of the Federal Rules but carrying no independent rulemaking force.1Mass.gov. Statement of the Supreme Judicial Court and Introduction The Guide describes the law; the appellate decisions and statutes it cites are what actually control.
The sections below track that Guide, because that is how judges and lawyers in the Commonwealth talk about the law.
Relevance and the Balancing Test
Section 401 sets the entry threshold. Evidence is relevant if it makes a fact of consequence in the case more or less likely than it would be without the evidence.2Mass.gov. Section 401 – Test for Relevant Evidence Section 402 makes all relevant evidence presumptively admissible unless the Massachusetts Constitution, a statute, or another recognized evidentiary principle excludes it. Irrelevant evidence never comes in.
Relevance alone is not enough. Under Section 403, a judge may exclude relevant evidence when its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, misleading the jury, or needless waste of time.3Mass.gov. Section 403 – Excluding Relevant Evidence for Prejudice, Confusion, Waste of Time, or Other Reasons Gruesome photographs are the classic illustration: factually accurate but potentially so inflammatory that a jury might decide on emotion. Trial judges use Section 403 constantly, and it is one of the most heavily litigated evidentiary issues at trial.
Character Evidence and Other Bad Acts
Section 404 begins with a firm prohibition. Evidence of a person’s character generally cannot be used to argue they acted in line with that character on a particular occasion. Showing that someone has a bad temper does not prove they threw a punch on a specific Tuesday, and admitting that kind of evidence invites the jury to punish who a person is rather than what they did.
Criminal cases carve out limited exceptions. A defendant may offer evidence of a relevant character trait in reputation form, and the prosecution can respond in kind. Self-defense claims widen the door: the defendant may introduce the alleged victim’s reputation for violence, specific violent acts by the victim, or threatening statements the victim made, whether or not the defendant knew about them at the time.4Mass.gov. Section 405 – Methods of Proving Character Massachusetts differs from the Federal Rules on method: character is generally proved through reputation testimony, not opinion testimony, unless specific instances of conduct are independently admissible.
Section 404(b) handles evidence of other crimes, wrongs, or acts. Such evidence cannot be used to show that a person has bad character and therefore acted badly again. It can be admitted for other purposes: motive, opportunity, intent, preparation, plan, knowledge, identity, the nature of a relationship, or absence of mistake. Prosecutors lean on this provision frequently. Every 404(b) offering still has to survive the Section 403 balancing test.
The Rape Shield Law
Section 412, Massachusetts’s rape shield law, restricts evidence about an alleged victim’s sexual history in cases involving alleged sexual misconduct. In both civil and criminal proceedings, three categories are prohibited: other sexual behavior by the victim, the victim’s sexual reputation, and the victim’s sexual orientation offered to prove consent.5Mass.gov. Section 412 – Sexual Behavior or Sexual Reputation (Rape-Shield Law)
p>Criminal cases allow narrow exceptions. A defendant may offer evidence of specific sexual behavior between the victim and the defendant, or evidence that someone other than the defendant was the source of a physical condition. Evidence may also come in when excluding it would violate the defendant’s constitutional rights. Any such evidence requires a motion, an offer of proof, and a hearing at which the judge must find that the probative value outweighs the prejudicial effect to the victim. That written finding is not shared with the jury.5Mass.gov. Section 412 – Sexual Behavior or Sexual Reputation (Rape-Shield Law)
Hearsay and Its Exceptions
Hearsay is the largest single body of evidence law. Section 801 defines it as a statement made outside the current proceeding that a party offers to prove the truth of what the statement asserts. If someone told a friend “the light was red” and a lawyer tries to use that remark to prove the light was actually red, the remark is hearsay. Section 802 makes hearsay inadmissible because the person who made the statement is not in the courtroom, under oath, or subject to cross-examination.6Mass.gov. Section 802 – The Rule Against Hearsay
Some out-of-court statements are defined as not hearsay in the first place. Section 801(d) covers a witness’s prior inconsistent statements given under oath, prior consistent statements offered to rebut a charge of recent fabrication, and statements by an opposing party offered against that party. These come in as substantive evidence without needing any exception.7Mass.gov. Section 801 – Definitions
Exceptions That Do Not Require Unavailability
Section 803 lists exceptions that apply whether or not the person who made the statement is available to testify. An excited utterance, under 803(2), is a statement made while the speaker was still under the stress of a startling event; the theory is that the shock leaves no time to fabricate. Section 803(4) covers statements made for medical diagnosis or treatment, since patients describing symptoms to a doctor have a built-in reason to be accurate.8Mass.gov. Section 803 – Hearsay Exceptions; Availability of Declarant Immaterial
Business records are another major 803 exception, reinforced by General Laws Chapter 233, Section 78. A record qualifies if it was made in the regular course of business, at or near the time of the event, and the business routinely kept such records. The record must also have been made in good faith and before the legal proceeding began.9General Court of Massachusetts. Massachusetts Code Chapter 233 Section 78
Exceptions That Require Unavailability
Section 804 exceptions apply only when the person who made the statement cannot testify because of death, illness, privilege, or absence the offering party could not reasonably prevent. The key ones:
- Prior recorded testimony from an earlier proceeding, if the opposing party had the opportunity and a similar motive to examine the witness at that time.
- Dying declarations, admissible in Massachusetts only in homicide prosecutions, only where the speaker believed death was imminent and described the cause or circumstances of their own impending death, and only where the speaker actually died.
- Statements against interest — statements so damaging to the speaker’s financial, legal, or property interests that a reasonable person would not have made them unless they were true. In criminal cases, a statement exposing the speaker to criminal liability cannot be used to exonerate or incriminate a defendant absent corroborating circumstances that clearly show trustworthiness.
The Confrontation Clause Overlay in Criminal Cases
Satisfying a hearsay exception is not enough in a criminal case. The Sixth Amendment’s Confrontation Clause, and its Massachusetts counterpart in Article 12 of the Declaration of Rights, impose an additional barrier. Under Crawford v. Washington (2004), testimonial statements from an absent witness are inadmissible against a criminal defendant unless the witness is unavailable and the defendant had a prior opportunity to cross-examine them.11Mass.gov. Article VIII – Introductory Note The SJC has held that Article 12 is coextensive with the Sixth Amendment.
In practice, a criminal judge asks four questions of any out-of-court statement the prosecution offers for its truth: Is it hearsay? Does it satisfy an exception? Is it testimonial? If so, was the witness previously cross-examined and currently unavailable? A statement has to clear all four to come in.11Mass.gov. Article VIII – Introductory Note Civil cases need only satisfy the hearsay rules.
Privileges
Section 501 sets the default: no one may refuse to testify, withhold information, or block someone else from testifying unless a specific source of law grants a privilege. Recognized sources are the constitution, statutes, SJC rules, and the common law.12Mass.gov. Section 501 – Privileges Recognized Only as Provided
Attorney-Client
Section 502 protects confidential communications made to obtain or provide legal services. It covers conversations between client and lawyer, between the lawyer and the lawyer’s staff, and among attorneys representing the same client. Only the client holds the privilege, so only the client, their guardian, personal representative, or successor can waive it.13Mass.gov. Section 502 – Attorney-Client Privilege
It has limits. It does not apply when legal services were sought to commit or plan a crime or fraud, when the dispute is between attorney and client over a breach of duty, or when the communication is relevant to a dispute between parties claiming through the same deceased client.13Mass.gov. Section 502 – Attorney-Client Privilege
Psychotherapist-Patient and Spousal
Section 503, drawn from General Laws Chapter 233, Section 20B, protects communications between a patient and a psychotherapist relating to the diagnosis or treatment of a mental or emotional condition. The point is candor in therapy.14Mass.gov. Section 503 – Psychotherapist-Patient Privilege
Section 504 covers two spousal protections. In a criminal case, a spouse cannot be compelled to testify against the defendant-spouse, with exceptions for crimes involving desertion, nonsupport, or offenses against a spouse or child. And neither spouse may be required to testify about private communications between them, unless the communication occurred in the presence of a third party or during a crime in which both participated.15Mass.gov. Section 504 – Spousal Privilege and Disqualification; Parent-Child Disqualification
Voluntary disclosure of a privileged communication to someone outside the protected relationship generally destroys the privilege for that subject matter. Failing to object when privileged information surfaces at trial can have the same effect. Courts construe privileges narrowly.
Witnesses: Competency, Knowledge, and Experts
Under Section 601, every person is presumed competent to testify unless a statute or the common law says otherwise. Massachusetts adds specific requirements: a witness must be able to observe, remember, and communicate what they experienced, must understand the difference between truth and falsehood, and must be aware that lying carries consequences.16FindLaw. Massachusetts Guide to Evidence Section 601 Whether a witness meets these standards is a preliminary question for the judge. Credibility is for the jury.
Section 602 requires personal knowledge. A witness who did not see, hear, or otherwise experience something firsthand cannot testify about it unless they are qualified as an expert.17Mass.gov. Section 602 – Need for Personal Knowledge Section 603 requires an oath or affirmation before any testimony, designed to impress on the witness the duty to tell the truth and subject them to perjury charges for knowingly lying.18Mass.gov. Section 603 – Oath or Affirmation to Testify Truthfully
A lay witness offering an opinion under Section 701 must stay with opinions based on their own perceptions that help the jury understand the testimony or decide a fact. They cannot wander into scientific or specialized territory. An expert, under Section 702, may testify if their knowledge, skill, or training will help the jury, the testimony rests on sufficient facts, and the expert uses reliable methods applied reliably to the case.19Mass.gov. Section 702 – Testimony by Expert Witnesses
Massachusetts evaluates expert scientific evidence under the framework adopted in Commonwealth v. Lanigan, 419 Mass. 15 (1994), which followed the reasoning of the U.S. Supreme Court’s Daubert decision. The trial judge acts as gatekeeper and considers whether the theory or method has been tested, whether it has been peer-reviewed, and whether it is generally accepted in the relevant scientific community. The SJC noted that general acceptance often remains the central issue, but is not the only way to demonstrate reliability.20Justia Law. Commonwealth v. Thomas J. Lanigan
Impeaching a Witness
Impeachment is the process of undermining credibility, and the most structured tool for it in Massachusetts is prior criminal convictions.
Prior Convictions
Section 609 allows a party to use a witness’s criminal record to attack credibility, but with strict time limits keyed to severity:
- Misdemeanors: usable for five years from the date of sentencing, unless the witness was convicted of another crime within five years of the testimony.
- Felonies without a state prison sentence: usable for ten years from the date of conviction or sentencing, with the same subsequent-conviction extension.
- Felonies with a state prison sentence: usable for ten years from the expiration of the minimum prison term, with the same extension.
- Traffic violations punishable by fine only: unusable unless the witness has another criminal conviction within five years of the testimony.
A party may refer to the conviction itself through court records or a certified copy but cannot mention the sentence that was imposed. Time spent as a fugitive does not count toward these limits.
Prior Inconsistent Statements
Section 613 governs impeachment through a witness’s own earlier contradictory statements. The rules differ depending on who called the witness. A party impeaching its own witness must first lay a foundation by asking whether the prior statement was made and giving the witness a chance to explain. When impeaching the other side’s witness, extrinsic evidence of the inconsistency is admissible without that foundation requirement.22Mass.gov. Section 613 – Prior Statements of Witnesses, Limited Admissibility In either case, the judge may exclude extrinsic evidence offered on purely collateral matters.
Authenticating Evidence
Before anything comes in, the party offering it has to show it is what they claim. Section 901 requires enough proof to support a finding of authenticity, which can come from testimony by someone with personal knowledge, comparison with authenticated samples, or other circumstantial indicators.23Mass.gov. Section 901 – Authenticating or Identifying Evidence
Some items need no outside witness. Section 902 lists self-authenticating evidence, including court records under seal, certified copies of public records, and official documents with proper attestation.24Mass.gov. Section 902 – Evidence That Is Self-Authenticating
Digital Evidence
Section 1119 addresses digital evidence specifically. Text messages, emails, social media posts, and other electronic communications must be authenticated, but the standard is practical: enough evidence that a reasonable person could find the digital evidence more likely than not to be what the party claims. Methods include testimony from someone who personally witnessed the digital content, testimony from someone familiar with the voice or writing style, confirming circumstances linking the evidence to a particular person, or expert testimony about the system that created it.25Mass.gov. Section 1119 – Digital Evidence
The judge does not decide whether the digital evidence is actually authentic. The judge decides only whether there is enough evidence for the jury to reach that conclusion. The mere possibility that digital evidence was altered goes to weight, not admissibility. In a criminal jury trial, the judge should instruct the jury that they may consider a digital communication only if they are persuaded, by a preponderance of the evidence, that it is genuine.25Mass.gov. Section 1119 – Digital Evidence
The Best Evidence Rule
Section 1002 requires the original writing or record when a party is trying to prove what a document says. To show that a contract contains a particular clause, you need the contract itself, not someone’s description of it. Common-sense exceptions apply: if the original was lost or destroyed, if the opponent has it and will not produce it, or if the writing is not closely related to a controlling issue, other evidence of the contents may be used.26Mass.gov. Section 1002 – Requirement of Original (Best Evidence Rule)
Preserving Evidentiary Issues for Appeal
Knowing the rules matters little if a lawyer fails to invoke them at trial. Section 103 spells out what preservation takes. When objecting to evidence the judge lets in, a party must make a timely objection on the record and state the specific legal ground. When challenging a ruling that keeps evidence out, the party must make an offer of proof explaining what the excluded evidence would have shown.27Mass.gov. Section 103 – Rulings on Evidence, Objections, and Offers of Proof
Massachusetts adds a wrinkle on motions in limine. If a party raises a specific evidentiary objection in a pretrial motion that the court hears and denies, that preserves the issue for appeal even without a fresh objection at trial. But if the party never objected at trial and never raised the issue in a pretrial motion, the right to challenge the evidence on appeal is gone.27Mass.gov. Section 103 – Rulings on Evidence, Objections, and Offers of Proof Cases are quietly won and lost here. An otherwise strong evidentiary argument means nothing if it was not raised at the right time and in the right way.