Adjutant Evidence and the Defendant’s Own Record: Commonwealth v. Ramos

On August 13, 2026, the Supreme Judicial Court decided Commonwealth v. Ramos, SJC-12678, and in doing so addressed a question every defendant raising self-defense eventually faces. Should counsel offer evidence of the complainant’s history of violence, when doing so may let the Commonwealth put the defendant’s own history in front of the jury?

The court held that trial counsel’s decision to withhold that evidence was not ineffective assistance. The reasoning is worth understanding before the question arises in a case.

What Adjutant Evidence Is

Massachusetts generally forbids proof of a person’s character to show conduct on a particular occasion. Commonwealth v. Adjutant, 443 Mass. 649 (2005), created a narrow exception. Where the identity of the first aggressor is in dispute and the alleged victim has a history of violence, the trial judge has discretion to admit evidence of specific acts of prior violent conduct that the victim is reasonably alleged to have initiated, to support the defendant’s claim of self-defense. Adjutant, 443 Mass. at 664.

A defendant who intends to offer that evidence must give notice to the court and the Commonwealth, sufficiently before trial to let the Commonwealth investigate and prepare a rebuttal. The prosecutor must give reciprocal notice of rebuttal evidence.

What Happened in Ramos

The defendant was convicted of murder in the first degree on a theory of deliberate premeditation for a stabbing. His principal defense at trial was that he acted in lawful self-defense. He did not contest that he stabbed the victim. He contended that the victim was the first to use deadly force, attacking him with a screwdriver.

The defense rested primarily on a witness who testified that he saw the victim pull a screwdriver and swing it at the defendant, prompting the defendant to strike back. Trial counsel did not offer Adjutant evidence of the victim’s prior violent conduct. On appeal from the conviction and from the denial of a motion for a new trial, the defendant argued that this omission was constitutionally ineffective.

The Holding

The court assumed for the sake of argument that the trial judge would have admitted the evidence, and held that counsel’s decision to forgo it was still not manifestly unreasonable. The reason was specific to the record. Offering the victim’s prior violent conduct would have opened the door to the defendant’s own prior convictions, and the defendant was the only one of the two men with a conviction of assault and battery.

A defense that rests on who first used a deadly weapon does not survive a jury learning that the person claiming self-defense is the one with the record for violence. Counsel weighed that and chose not to open the subject. The court found the strategic reason ascertainable on the record, which is the standard that defeats an ineffective assistance claim.

Two Limits the Court Confirmed

The evidence goes to self-defense and nothing else. The defendant argued that admitting the evidence could have supported a manslaughter verdict. The court rejected that directly. A jury may consider Adjutant evidence only for the limited purpose of assessing a disputed self-defense claim. Commonwealth v. Morales, 464 Mass. 302, 311 n.14 (2013).

A limiting instruction is required. Where a judge admits evidence of prior violent conduct, the judge must instruct the jury that they may consider it only for that limited purpose. Morales, 464 Mass. at 310 to 311.

The Sudden Combat Instruction

The defendant also argued that he was entitled to an instruction on voluntary manslaughter by sudden combat. At the charge conference, trial counsel had withdrawn the request for that instruction, explaining that he believed the case law made it unwarranted. The court held that the judge was not required to give the instruction on her own motion after counsel specifically withdrew the request, citing Commonwealth v. Waller, 486 Mass. 72, 75 to 76 (2020), where the court explained that a judge has no obligation to instruct on self-defense when neither party requests it, because doing so may interfere with a defendant’s right to present a chosen defense.

The jury in Ramos were instructed on self-defense, on murder in the first and second degrees, and on voluntary manslaughter by excessive use of force in self-defense and by reasonable provocation.

What This Means for a Defendant Weighing the Decision

Ramos does not change what Adjutant permits. It clarifies what the decision to use it costs. Three practical points follow.

• The decision is about two records, not one. Before offering the complainant’s history of violence, counsel has to know what the Commonwealth can offer in response about the client. Where the client has the worse record, the evidence can do more harm than good.
• Declining to offer it is a defensible strategic choice. After Ramos, a later claim that counsel should have offered the evidence will fail where the record shows counsel weighed the exposure and decided against it.
• The evidence has one job. It supports a disputed self-defense claim. It does not reduce murder to manslaughter, and the jury will be told so.

How This Fits With the Rest of 2025 and 2026

Three developments in eighteen months have narrowed the practical reach of this evidence.

In Commonwealth v. Rateree, 495 Mass. 610 (2025), the Supreme Judicial Court declined to extend the Adjutant rule to defense of another, pointing to the risks of putting the propensities of several people before one jury. In Ramos, the court confirmed that a defendant who offers the evidence risks putting his own record before the jury. And in February 2026 the District Court revised its self-defense instructions, 9.261 through 9.263, so that the overt act triggering a concern for safety is now defined as words, a gesture, or some other action.

Taken together, the substantive threshold for raising self-defense is stated more broadly than before, while the evidentiary tool most associated with it has become narrower and more dangerous to use. The full framework is set out at self-defense in Massachusetts.

Key Takeaways

• Commonwealth v. Ramos, SJC-12678 (Aug. 13, 2026), holds that counsel was not ineffective for declining to offer Adjutant evidence where it would have opened the door to the defendant’s own prior convictions.
• Adjutant evidence may be considered only to assess a disputed self-defense claim, and a limiting instruction to that effect is required. Commonwealth v. Morales, 464 Mass. 302, 310 to 311 (2013).
• It cannot by itself support a manslaughter verdict.
• A judge need not give a sudden combat instruction on her own motion after counsel withdraws the request. Commonwealth v. Waller, 486 Mass. 72, 75 to 76 (2020).
• The threshold rule remains that the identity of the first aggressor must be in dispute and the alleged victim must have a history of violence. Commonwealth v. Adjutant, 443 Mass. 649, 664 (2005).

Related Serpa Law Office Resources

• self-defense in Massachusetts
• self-defense and mutual combat
• assault and battery with a dangerous weapon
• Massachusetts domestic violence defense
• rights and legal concepts