Welch v. United States
The Court ruled that its earlier decision striking down the "residual clause" of the Armed Career Criminal Act as unconstitutionally vague applies retroactively, meaning people already sentenced under that clause can now challenge their sentences in habeas proceedings.
The ruling opened the door for potentially thousands of federal prisoners sentenced to enhanced mandatory terms under the invalidated clause to seek resentencing, even though their convictions had already become final years earlier.
How it got here: After his sentence became final, Welch filed a habeas motion that was denied; the Eleventh Circuit denied him permission to appeal, and he asked the Supreme Court to decide if the vagueness ruling applies retroactively.
The Case in Depth
What happened
Gregory Welch pleaded guilty to being a felon in possession of a firearm. Because he had a prior Florida robbery conviction along with other prior convictions, a federal judge sentenced him under the Armed Career Criminal Act's residual clause to the Act's mandatory 15-year minimum instead of the usual 10-year maximum. His conviction became final before the Supreme Court later struck down that clause as unconstitutionally vague in a separate case, Johnson v. United States.
The question before the Court
The Court had already struck down part of a tough federal gun-sentencing law as too vague. Could people already serving final sentences under that law use the ruling to challenge their sentences?
The Court's answer
Yes — the Court ruled that its earlier decision in Johnson v. United States, which struck down the residual clause as unconstitutionally vague, is a substantive rule and therefore applies retroactively to people whose sentences were already final. That means prisoners like Welch can raise the issue in collateral habeas challenges, not just in cases still on direct appeal.
The Court reasoned that because the invalidated clause can no longer authorize any sentence at all, it changed the class of people the law can punish and how severely — the hallmark of a substantive rule under the Court's retroactivity framework. This is different from purely procedural rules, which only change how guilt or punishment is determined and generally don't apply retroactively to closed cases.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Federal prisoners who received 15-years-to-life sentences based partly on the now-invalid residual clause can file habeas petitions seeking to have those sentences reduced, potentially back down to a 10-year maximum. Federal courts nationwide had to process a wave of these collateral challenges, and prosecutors and defense lawyers had to relitigate old sentencing records.
What changes now
The case goes back to the Eleventh Circuit, which must now decide whether Welch is actually entitled to relief, including whether his prior robbery conviction still counts as a violent felony under a different part of the law that was not struck down. This is a final merits ruling on the retroactivity question, but it does not guarantee Welch a reduced sentence, and other prisoners with similar sentences can now raise the same retroactivity argument in their own cases.
What this does not decide
The ruling does not decide whether Welch's own sentence should actually be reduced — that depends on whether his prior robbery conviction still qualifies as a violent felony under a separate, still-valid part of the statute. The Court also does not decide any of the underlying merits of that separate question.
Concurrences and dissents
Dissent — Justice Thomas
Justice Thomas argued the Court should never have reached the retroactivity question because Welch never raised a vagueness claim in his original habeas motion, so there was no error for any court to correct. On the merits, he argued the vagueness ruling is not truly substantive because it does not place any conduct or class of people beyond Congress's power to punish — Congress remains free to rewrite the clause more precisely. He warned the majority's focus on a rule's practical effect rather than its underlying legal character erodes the distinction between substantive and procedural rules and undermines finality in criminal cases.
How the Court got there
The legal reasoning, step by step
- The Court applied the Teague framework, which asks whether a new rule announced after a conviction becomes final can still be used to challenge that conviction on collateral review. Under Teague, new procedural rules generally do not apply retroactively, but new substantive rules do.
- A rule counts as substantive if it changes the range of conduct or the class of people the law can punish, rather than merely changing the methods used to determine guilt or punishment.
- The Court reasoned that because the vagueness ruling eliminated the residual clause entirely, it removed the legal basis for imposing the enhanced 15-year-to-life sentence on anyone whose qualifying conviction depended on that clause, shrinking the class of people subject to the harsher penalty.
- The Court rejected the argument that the rule should be classified as procedural just because the void-for-vagueness doctrine derives from due process, explaining that what matters is the practical function of the new rule, not the constitutional label attached to it.
- The Court also rejected the theory that only rules limiting Congress's power to punish, or only rules interpreting rather than invalidating statutes, can be substantive, pointing to a prior case allowing retroactive relief for a narrowing statutory interpretation as proof that statutory invalidation can be treated the same way.
- Because the invalidated clause could no longer authorize any sentence at all, the Court concluded the vagueness ruling was a substantive rule that applies retroactively to people whose sentences already became final.
Doctrinal impact
Cases affected by this decision
Reaffirms Bousley v. United States (523 U.S. 614)
The Court relied on Bousley as establishing that decisions narrowing a criminal statute's reach are substantive and retroactive.