Consent in Massachusetts Rape and Sexual Assault Cases: Force, Incapacity, Age, Mistaken Belief, and Withdrawn Consent

In a Massachusetts rape trial, the Commonwealth must prove beyond a reasonable doubt that the complainant did not consent to the sexual intercourse and that the defendant compelled the intercourse by force or by threat of bodily injury. A complainant who was too impaired by alcohol or drugs to give or refuse consent could not consent. In that case the only force the Commonwealth must prove is the force of the penetration itself.

A child under 16 cannot consent to sexual intercourse at all. Massachusetts has no statute that defines consent. The rules come from G.L. c. 265, § 22, from the related sexual offense statutes, and from the decisions of the Supreme Judicial Court and the Appeals Court that apply those statutes.

This page explains those rules. They govern force and threats, consent at the moment of each act, incapacity from alcohol or drugs, the age of consent, a defendant’s mistaken belief in consent, withdrawal of consent during intercourse, consent obtained by fraud, consent in indecent assault and battery cases, and the difference between the criminal law and a college’s affirmative consent policy. Attorney Joe Serpa has practiced Massachusetts criminal defense since 1995 and defends rape and sexual assault charges in the District Courts, the Boston Municipal Court, and the Superior Court in eastern Massachusetts.

Force, Threats, and Constructive Force Under G.L. c. 265, § 22

G.L. c. 265, § 22(b) punishes a person who has sexual intercourse or unnatural sexual intercourse with another person and “compels such person to submit by force and against his will, or compels such person to submit by threat of bodily injury.” The Supreme Judicial Court reads “by force” and “against his will” as two separate elements, so the Commonwealth must prove both force and lack of consent. Commonwealth v. Lopez, 433 Mass. 722, 726-727 (2001).

The essence of the crime “is sexual intercourse with another compelled by force and against the victim’s will or compelled by threat of bodily injury.” Commonwealth v. Sherry, 386 Mass. 682, 687 (1982).

Any penetration, however slight, is sexual intercourse. A person convicted of rape under § 22(b) faces up to twenty years in state prison. A person convicted of aggravated rape under § 22(a), which covers a rape that results in serious bodily injury, a rape committed during certain other felonies, and a rape committed by a joint enterprise, faces imprisonment for life or for any term of years.

The force the statute requires may be physical force, violence, or a threat of bodily harm. It may also be constructive force, which is conduct and words calculated to make the complainant submit out of fear.

In Commonwealth v. Caracciola, 409 Mass. 648, 652-653 (1991), a man who posed as a police officer, wore a gun, and threatened to lock the complainant up if she did not obey him used force within the meaning of the statute, even though he never struck her. The court wrote that “the force needed for rape may, depending on the circumstances, be constructive force, as well as physical force, violence, or the threat of bodily harm.” 409 Mass. at 653. A prosecutor who relies on constructive force must still prove separately that the intercourse was against the complainant’s will. 409 Mass. at 653-654.

The complainant does not have to fight back. The Supreme Judicial Court has described the rule that victims need not use any force to resist an attack as long-standing in Massachusetts. Lopez, 433 Mass. at 729. Any resistance is enough when it shows that the lack of consent was honest and real. The jury may consider the whole sequence of events, including the acts of several defendants, in deciding whether the complainant was able to resist. Sherry, 386 Mass. 682.

Consent at the Moment of Each Act

The jury decides whether the complainant consented at the time of each act of penetration. Lopez, 433 Mass. at 727. Consent to one act is not consent to another act. Consent to intercourse with one person is not consent to intercourse with a second person.

A prior sexual relationship between the complainant and the defendant is not consent to the act charged, although evidence of the complainant’s sexual conduct with the defendant may be admitted under the rape shield statute after a hearing, as explained below. Consent to an earlier completed act of intercourse on the same night does not by itself entitle a defendant to a jury instruction on withdrawn consent for a later act. Commonwealth v. Sherman, 481 Mass. 464, 475 (2019).

Incapacity to Consent From Alcohol, Drugs, Sleep, or Unconsciousness

A complainant who is so impaired by alcohol or drugs that she cannot give or refuse consent cannot consent. The rule dates to 1870, when the Supreme Judicial Court upheld the rape conviction of a man who had intercourse with a woman who was “so drunk as to be utterly senseless.” Commonwealth v. Burke, 105 Mass. 376, 377, 380-381 (1870).

The modern rules come from Commonwealth v. Blache, 450 Mass. 583 (2008). Intoxication by itself is not incapacity. “The question instead is whether, as a result of the complainant’s consumption of drugs, alcohol, or both, she was unable to give or refuse consent.” 450 Mass. at 591-592. The complainant does not have to have been unconscious or nearly so.

A judge instructs the jury on incapacity in any case where the evidence would support a finding that, because of alcohol, drugs, sleep, unconsciousness, or helplessness, the complainant was so impaired as to be incapable of consenting. 450 Mass. at 592. Massachusetts applies the same rule whether the complainant drank or took the drugs willingly or someone else gave them to her without her knowledge. New York and eighteen other states treat intoxication as incapacity only when someone else administered the drug or alcohol without the person’s consent, a rule the Cornell fraternity case brought under scrutiny in 2026. The firm’s post on voluntary intoxication and consent explains the difference.

A jury that finds beyond a reasonable doubt that the complainant was incapable of consenting has found lack of consent. The Commonwealth then needs to prove only the force needed to accomplish the penetration itself. 450 Mass. at 590-592. The Supreme Judicial Court restated both rules in 2024. Campbell v. Commonwealth, 494 Mass. 750 (2024).

Blache also protects the defendant. A prosecutor who relies on incapacity must prove beyond a reasonable doubt that the defendant “knew or reasonably should have known that the complainant’s condition rendered her incapable of consenting to the sexual act.” 450 Mass. at 594.

A defendant is entitled to that instruction whenever the evidence raises a question about the complainant’s capacity to consent. The knowledge requirement is the only form in which Massachusetts recognizes a defendant’s mistaken belief in consent, as explained in the section on mistaken belief below. The same rules on intoxication apply to a charge of indecent assault and battery.

Massachusetts also makes it a separate crime to drug a person for sex. G.L. c. 272, § 3 punishes anyone who gives a person “any drug, matter or thing with intent to stupefy or overpower such person so as to thereby enable any person to have sexual intercourse or unnatural sexual intercourse with such person.” A person convicted under § 3 faces imprisonment in state prison for life or for any term of years not less than ten.

The Age of Consent and Statutory Rape

A child under 16 cannot consent to sexual intercourse in Massachusetts. G.L. c. 265, § 23 punishes whoever “unlawfully has sexual intercourse or unnatural sexual intercourse, and abuses a child under 16 years of age,” with imprisonment in state prison for life or for any term of years, or in a jail or house of correction. The offense is commonly called statutory rape.

The Commonwealth must prove the intercourse and the child’s age, and nothing more. Lack of consent is not an element, and the defendant’s intent is irrelevant. Commonwealth v. Wilbur W., 479 Mass. 397, 398-399 (2018). A defendant’s reasonable belief that the child was 16 or older is no defense, even where the child showed identification and claimed to be older. Commonwealth v. Miller, 385 Mass. 521, 522 (1982). A judge may not continue a § 23 case without a finding or place it on file.

Section 23A makes the offense aggravated rape and abuse of a child, punishable by life or any term of years with a minimum of ten years in state prison, where the child was under 12 and the defendant more than five years older, where the child was between 12 and 16 and the defendant more than ten years older, or where the defendant was a mandated reporter under G.L. c. 119, § 21.

Rape of a child by force under § 22A, which requires the Commonwealth to prove force or threat in addition to the child’s age, is punishable by life or any term of years.

For touching short of intercourse, the age line is 14. Under G.L. c. 265, § 13B, a child under 14 “shall be deemed incapable of consenting to any conduct of the defendant for which such defendant is being prosecuted,” and a person convicted faces up to ten years in state prison. Indecent assault and battery on a person who is 14 or older is charged under § 13H. For that offense the Commonwealth must prove lack of consent.

In 2026 the Legislature added a third age line for adults in positions of authority. Under new G.L. c. 265, § 23A½, added by St. 2026, c. 137, § 86, effective July 9, 2026, a child under 18 is deemed incapable of consenting to sexual conduct with a mandated reporter who holds, or has held, custodial or supervisory authority over the child, such as a teacher, a guidance counselor, or a social worker.

The statute does not apply where the defendant is not more than four years older than the child. A person convicted faces up to twenty years in state prison for sexual intercourse with a child who is 16 or 17, and up to ten years in state prison or two and one-half years in a house of correction for indecent assault and battery on a child who is 14 to 17. A judge may not continue the case without a finding or place it on file. The end of the defendant’s authority over the child is not a defense.

A Mistaken Belief in Consent

The Commonwealth does not have to prove that the defendant knew the complainant was not consenting. Rape is a general intent crime. The Commonwealth proves it by proving that the defendant intended intercourse by force and that the complainant did not in fact consent. Lopez, 433 Mass. at 727-728.

The Supreme Judicial Court said in 1982 that whether a reasonable and honest mistake about consent is a defense had never been decided in Massachusetts. The court did not decide the question then either. Sherry, 386 Mass. 682. In Lopez the court declined to recognize the defense, reasoning that “[p]roof of the element of force, therefore, should negate any possible mistake as to consent.” 433 Mass. at 729. The court left the question open for a future case in which a claim of reasonable mistake is “at least arguably supported by the evidence.” 433 Mass. at 732.

The defendant in Lopez testified that the complainant consented. The court held that his claim of actual consent did not entitle him to a mistake instruction. The court reaffirmed the rule in Commonwealth v. Urban, 450 Mass. 608 (2008).

The Appeals Court has restated the rule. Massachusetts does not recognize mistake of fact about consent as a defense to rape, except to the extent that Blache recognizes it in incapacity cases. Commonwealth v. Butler, 97 Mass. App. Ct. 223, 230-231 (2020).

Some states instruct juries on a defendant’s honest and reasonable belief in consent, including New Jersey, where the force required for rape is only the force of the penetration. Massachusetts requires more force than that in a case not based on incapacity. The Supreme Judicial Court has treated the force requirement as the protection a mistaken defendant needs. 433 Mass. at 729-731.

The rule has two practical results. In a case built on force, a defendant who says the complainant consented is making an argument about the facts. The jury must acquit if it has a reasonable doubt about force or about consent.

In a case built on incapacity, the Commonwealth must prove that the defendant knew or reasonably should have known that the complainant could not consent. A defendant who did not know and could not reasonably have known is not guilty of rape on that theory. A defendant who ignored a clear refusal cannot claim a mistake. Commonwealth v. Kennedy, 478 Mass. 804, 811 (2018).

Withdrawal of Consent During Intercourse

Intercourse that begins with consent becomes rape when the complainant withdraws consent, reasonably communicates the withdrawal, and the defendant continues by the force needed to continue. Sherman, 481 Mass. at 473-475. The Appeals Court had held the same in Commonwealth v. Enimpah, 81 Mass. App. Ct. 657, 661 (2012), where the complainant consented to the initial penetration, withdrew her consent during intercourse, and the defendant forcibly continued despite her pleas to stop.

The communication of withdrawal need not be in words. “Physical gestures, such as trying to push the defendant away or attempting to move in a way that would require the defendant to end the penetration, may suffice,” as long as a reasonable person in the defendant’s circumstances would have understood them. The Commonwealth does not have to prove that the defendant himself understood the withdrawal.

The judge gives a withdrawn-consent instruction only where the evidence shows that the complainant consented to the act at first and then withdrew consent during it, or where the jury asks about withdrawal. Neither a defendant’s testimony that the complainant consented throughout nor the complainant’s consent to an earlier completed act warrants the instruction by itself. 481 Mass. at 475.

Where the complainant never consented to the act, the Commonwealth does not have to prove that she communicated a refusal at all. A complainant’s request that the defendant use a condom is not consent and does not show initial consent that was later withdrawn. Commonwealth v. Scott, 98 Mass. App. Ct. 843, 856-857 (2020).

Consent Obtained by Fraud or Deception

Intercourse obtained by fraud is not rape in Massachusetts, because fraud is not force. In Suliveres v. Commonwealth, 449 Mass. 112 (2007), the defendant had intercourse with the complainant in a dark room by impersonating her boyfriend. The Supreme Judicial Court held that there was no evidence of rape, because the rule of Commonwealth v. Goldenberg, 338 Mass. 377, 384 (1959), is that “intercourse where consent is achieved by fraud does not constitute rape,” and the court declined to overrule Goldenberg.

The court wrote that the Legislature is free to amend the rape statute or to create a new offense covering the conduct. Suliveres remains the rule unless the Legislature changes it. A person who obtains intercourse by impersonating a police officer and threatening arrest, by contrast, uses constructive force under Caracciola, because the threat, not the lie, compels the submission.

Consent and Indecent Assault and Battery

Indecent assault and battery on a person fourteen or older, G.L. c. 265, § 13H, punishes an intentional, indecent touching without consent. A person convicted faces up to five years in state prison or up to two and one-half years in a house of correction. Lack of consent is an element the Commonwealth must prove, so consent is a complete defense. Indecent assault and battery is a general intent crime. Kennedy, 478 Mass. at 810. The Commonwealth therefore does not have to prove that the defendant intended the touching to be without consent.

Because the Commonwealth does not have to prove force for this charge, the appellate courts have discussed whether a defendant may be entitled to a mistake-of-fact instruction where the evidence supports an honest and reasonable belief that the complainant consented. They have refused the instruction where the complainant said no and where the evidence did not support the claim. Kennedy, 478 Mass. at 811. Butler, 97 Mass. App. Ct. at 230-231. The Blache rules on intoxication and on the defendant’s knowledge apply to this charge as well.

A child under 14 cannot consent to an indecent touching under § 13B. Section 13F protects a person with an intellectual disability and requires the Commonwealth to prove that the defendant knew of the disability. A person convicted of a first offense under § 13F faces five to ten years in state prison.

Affirmative Consent on Campus and the Criminal Law

A college disciplinary case and a criminal case apply different definitions of consent to the same conduct. Many college policies, and the policies New York requires of every college in that state, define consent as a knowing, voluntary, and mutual decision expressed through words or actions, under which silence or lack of resistance is not consent. Massachusetts law requires each public and private college in the Commonwealth to adopt a sexual misconduct policy, G.L. c. 6, § 168E, but the statute does not define consent. Each college writes its own definition.

The Massachusetts criminal law has no affirmative consent requirement. The Commonwealth must prove that the complainant did not consent and that the defendant used force or threat, or that the complainant was incapable of consenting and the defendant knew or should have known it.

A student can be found responsible under a college’s affirmative consent policy by a preponderance of the evidence and never be charged with a crime. A student acquitted of a crime can still be expelled. The firm’s pages on college and university students and on the Cornell fraternity case explain how the two systems work side by side.

Proving and Contesting Consent at Trial

The Commonwealth proves lack of consent through the complainant’s testimony, the testimony of the first person she told that she was sexually assaulted, medical and forensic evidence, text messages and other digital evidence, and the defendant’s own statements. The complainant’s testimony alone can support a conviction if the jury believes it beyond a reasonable doubt.

Under the first complaint doctrine, the first person the complainant told may testify to what she said and when. The jury may consider the timing of the complaint in weighing her credibility, with the instruction that sexual assault complainants may delay reporting for a variety of reasons. Commonwealth v. King, 445 Mass. 217, 242-248 (2005). An expert may explain in general terms why victims delay reporting or stay in contact with an assailant, but may not testify about the complainant herself. Commonwealth v. Mamay, 407 Mass. 412, 421-422 (1990).

The defense contests consent through cross-examination of the complainant, her prior inconsistent statements, her messages before and after the encounter, the testimony of witnesses who saw her condition, and evidence of bias or motive to lie.

The rape shield statute, G.L. c. 233, § 21B, bars evidence of the complainant’s reputation for sexual conduct. The statute also bars evidence of her specific sexual conduct with anyone other than the defendant unless the conduct explains a physical condition the Commonwealth relies on. Evidence of her sexual conduct with the defendant is admissible only after an in camera hearing on a written motion and a finding by the judge that its weight and relevancy outweigh its “prejudicial effect to the victim.”

A defendant’s constitutional right to show bias or motive to lie can override the statute, but the judge must limit that evidence as far as possible without infringing the right. Commonwealth v. Joyce, 382 Mass. 222, 229-231 (1981). The rule appears as § 412 of the Massachusetts Guide to Evidence.

The jury receives the instructions that fit the evidence. In a case built on force, the judge instructs on force, constructive force, threat of bodily injury, and lack of consent. The judge also tells the jury that the complainant was not required to resist.

In a case built on incapacity, the judge gives the Blache instruction on incapacity and on the defendant’s knowledge. In a case with evidence of initial consent and later withdrawal, the judge gives the Sherman instruction. In every case the judge tells the jury that the Commonwealth must prove each element beyond a reasonable doubt. Commonwealth v. Russell, 470 Mass. 464, 477-478 (2015).

Frequently Asked Questions About Consent in Massachusetts Sexual Assault Cases

Related Serpa Law Office resources

• Sexual Assault and Rape Defense in Massachusetts
• Charged With Indecent Assault and Battery in Massachusetts: Defenses, Penalties, and the Sex Offender Registry
• How the Men of Cornell University Failed Jane Doe: The Cornell Fraternity Rape Case Under Massachusetts Law
• Voluntary Intoxication and Consent After the Cornell Case: The New York Rule and the Massachusetts Rule
• Teachers and School Staff Accused of Assault, Threats, or Sexual Assault Against a Student in Massachusetts
• College and University Student Criminal Defense Lawyer: Boston and Cambridge
• Cross-Examination in Massachusetts Criminal Trials
• Massachusetts Student Criminal Defense FAQs