This month the Supreme Judicial Court threw out a murder conviction in the Dawn Jaffier case over gunshot residue evidence. In the same opinion, it vacated the defendant’s conviction for carrying a firearm without a license “without need for further discussion.” It needed no discussion because the answer was settled three years ago in Commonwealth v. Guardado.
Guardado changed who has to prove what in a Massachusetts gun possession case. It has been reopening convictions ever since. Here is what it held, who it helps, and who it does not.
The old rule: the defendant had to prove the license
For decades, a Massachusetts prosecutor charging someone with unlawfully carrying a firearm under G.L. c. 269, § 10(a) did not have to prove the person lacked a license. A general statute, G.L. c. 278, § 7, put that on the defendant: a defendant “relying for his justification upon a license … shall prove the same; and, until so proved, the presumption shall be that he is not so authorized.”
In practice, licensure was an affirmative defense. If the defendant did not produce evidence of a license, the jury was never asked about it, and judges did not instruct that the Commonwealth had to prove its absence.
What changed: Bruen, then Guardado
On June 23, 2022, the U.S. Supreme Court decided New York State Rifle & Pistol Ass’n v. Bruen, 597 U.S. 1 (2022), holding that the Second Amendment protects a right to carry a handgun in public for self-defense.
The SJC drew the consequence in Commonwealth v. Guardado, 491 Mass. 666 (2023) (Guardado I), decided April 13, 2023. Once carrying a firearm is constitutionally protected conduct, the absence of a license is what makes it a crime. The court held that “the failure to obtain a valid firearms license is now an essential element of unlawful possession of a firearm.” Due process “requires the Commonwealth to prove every essential element of the offense beyond a reasonable doubt.” So the Commonwealth must now prove the defendant had no license, and the jury must be instructed on it.
The ruling covered unlawful possession of a firearm, a loaded firearm and ammunition. It did not extend to large capacity feeding devices. The court held the defendant “was not entitled to an instruction that licensure is an essential element” of that offense, because those devices are not protected by the Second Amendment under existing precedent.
The remedy: a new trial, not an acquittal
In Guardado I, the SJC first ordered judgments of not guilty, which would have barred retrial. The Commonwealth moved for reconsideration, and in Commonwealth v. Guardado, 493 Mass. 1 (2023) (Guardado II), decided October 26, 2023, the court changed course.
Ordinarily, double jeopardy bars retrial when the evidence at trial was insufficient on an element. But the Commonwealth had not been required to prove licensure when Guardado was tried, so it never had a reason to. The court wrote that “because the Commonwealth is not being given a second bite at the proverbial apple to supply evidence that it was required to muster in the earlier trial, double jeopardy does not bar retrial.” The instruction was treated as trial error, and the remedy was a new trial.
That is the pattern in the cases since. The conviction is vacated. The Commonwealth may try the case again and, this time, prove the absence of a license. In many cases the state’s licensing records will let it do that.
Who can benefit, and who cannot
The dividing line is retroactivity. Guardado I held that its rule “should not be applied retroactively to convictions that became final prior to” Bruen. The holding “applies prospectively and to those cases that were active or pending on direct review as of the date of the issuance of that decision,” meaning June 23, 2022.
- Tried after Guardado: the jury should have been instructed on licensure. If it was not, that is error.
- Convicted before Guardado, but the case was still pending on direct appeal on June 23, 2022: covered. This is the group producing vacaturs now, because murder and other serious appeals can take years. The Jaffier case, tried long before 2022 and still on direct review, is an example.
- Conviction final before June 23, 2022: not covered. A conviction is generally final when direct appeals are over or the time to take one has passed. For these defendants, Guardado offers no path.
The opinions address convictions after trial. Whether and how the rule applies to a guilty plea is a separate question that depends on the plea record, and neither Guardado opinion decides it.
Why it keeps showing up in 2026
Serious cases move slowly through appeals. A defendant convicted of murder in the first degree gets plenary review in the SJC, and those appeals, along with motions for new trial filed while the appeal is pending, can run for many years. Every one of those cases that was pending on June 23, 2022 and included a charge under § 10(a) carries a Guardado issue, unless the jury was somehow instructed on licensure anyway.
The SJC said so briefly in the Jaffier case this month, citing its 2026 decision in Commonwealth v. Carleton, which in turn relied on Guardado II. The murder conviction in that case was vacated for a different reason. The firearm conviction fell on Guardado alone.
What this does not do
- It does not make carrying without a license legal. Massachusetts still requires a license, and unlicensed carrying is still a crime under § 10(a).
- It does not end the case. A vacated conviction usually means a retrial, not a dismissal.
- It does not reach convictions that were final before Bruen.
Frequently asked questions
What did Commonwealth v. Guardado decide?
In 2023, the SJC held that after the Supreme Court’s Bruen decision, the absence of a firearms license is an essential element of unlawful possession of a firearm, loaded firearm or ammunition. The Commonwealth must prove it beyond a reasonable doubt, and the jury must be instructed on it.
Does Guardado apply to my old gun conviction?
Only if your case was active or pending on direct review on June 23, 2022, when Bruen was decided, or was tried after that. Convictions that were final before that date are not covered.
If a conviction is vacated under Guardado, is the defendant free?
Not necessarily. In Guardado II the SJC held that double jeopardy does not bar retrial, so the Commonwealth may try the charge again and prove the lack of a license.
Does Guardado apply to large capacity magazine charges?
No. The SJC held that licensure is not an essential element of unlawful possession of a large capacity feeding device.
Sources: Commonwealth v. Guardado, 491 Mass. 666 (2023), and Commonwealth v. Guardado, 493 Mass. 1 (2023), slip opinions read in full from CourtListener (SJC-13315). Statutory text of G.L. c. 278, § 7 read at malegislature.gov. Citation verified: New York State Rifle & Pistol Ass’n v. Bruen, 597 U.S. 1 (2022). Commonwealth v. Carleton, 497 Mass. 11 (2026), is described as the SJC cited it in the Williams opinion; we were unable to retrieve Carleton itself. Whether a particular conviction was final on June 23, 2022 depends on its own procedural history. General information about Massachusetts law, not legal advice.