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United States v. Gary

Updated Sep 19, 2026

In brief

The Supreme Court overturned the Fourth Circuit's ruling: Gary must show on appeal that he would have presented evidence he did not know he was a felon before receiving relief.

Where it stands
Decided

Decided 8-1 · June 14, 2021 · Opinion by Justice Kavanaugh

What it’s about
This case considers whether a defendant who pleaded guilty to being a felon in possession of a firearm is automatically entitled to relief if the trial court failed to inform him that knowing his felon status was an element of the crime.
Who it affects
Defendants who did not object at trial cannot win relief just by pointing to the missing warning. On appeal, they must make a sufficient argument that they would have presented evidence showing they did not know they were felons.

Summary: written with AI from the case record.

Illustration for United States v. Gary
Conceptual illustration · AI-generated

What it's about

The Supreme Court ruled that defendants must show this error actually affected the outcome of their proceedings to receive relief.

The case explains how plain-error review (review of a mistake not raised at trial) works in federal guilty-plea cases involving firearm offenses.

Question presented

Whether a defendant who pleaded guilty to being a felon in possession of a firearm is automatically entitled to relief if the trial court failed to inform him that knowing his felon status was an element of the crime.

What the Court decided

Holding

In felon-in-possession cases, a Rehaif error is not a basis for plainerror relief unless the defendant first makes a sufficient argument or representation on appeal that he would have presented evidence at trial that he did not in fact know he was a felon. Under Rule 51(b) of the Federal Rules of Criminal Procedure, a defendant who has “an opportunity to object” to an alleged error and fails to do so forfeits the claim of error. If, as with Greer and Gary here, a defendant later raises the forfeited claim on appeal, Rule 52(b)’s plainerror standard applies. See Puckett v. United States, 556 U. S. 129, 135. To establish eligibility for plain-error relief, a defendant must show 483, affirmed. No. 20–444, 954 F. 3d 194, reversed.

Result
Reversed

The vote

  • Joined the judgment
  • Dissented
  • Wrote an opinion
Majority · 8joined the Court's opinion
  1. Barrett
  2. Breyer
  3. Kagan
  4. Thomas
  5. Kavanaughwrote the opinion
  6. Roberts
  7. Gorsuch
  8. Alito
Dissenting · 1disagreed with the result
  1. Sotomayorwrote the dissent
8 justices joined the judgment, 1 dissented.

What's next

Courts handling Gary's claim and similar appeals will apply the Supreme Court's standard. The Court's decision does not itself grant Gary relief; he must first make the required showing.

Documents

3

Docket activity

10
  • New analysis added

    Sep 19, 2026 · Court records

  • AI analysis generated: Impact Analysis

    Sep 19, 2026 · Generated

  • AI analysis generated: Opinion Summary

    Sep 19, 2026 · Generated

  • New analysis added

    Sep 19, 2026 · Court records

  • AI analysis generated: Case Briefing

    Sep 19, 2026 · Generated

Show 5 more
  • AI analysis generated: Decision Record

    Sep 19, 2026 · Generated

  • Case data updated: status, opinion_date

    Sep 5, 2026 · Court records

  • Opinion added: opinion

    Jun 14, 2021 · Court records

  • Brief added: Petition

    Oct 5, 2020 · Court records

  • Brief added: Questions Presented

    Court records

More questions

4
What did United States v. Gary decide?
The Supreme Court overturned the Fourth Circuit's ruling. It rejected automatic relief for a missed warning and required the defendant to show the mistake affected the case.
How can a defendant win relief after this kind of error?
He must argue on appeal that he would have presented evidence at trial that he did not know he was a felon.
Did Gary's failure to object matter?
Because Gary did not object when he had the chance, his claim gets plain-error review for mistakes not raised at trial.
What happens next in Gary's case?
Courts handling Gary's claim and similar appeals will apply the Supreme Court's standard. The Court's decision does not itself grant Gary relief.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Sep 19, 2026Methodology

Court records and filings

Reporting and analysis