Gun rights for drug users
Stephen Biviano Zapata v. United States
In brief
- Where it stands
- Dismissed
Petition denied.
- What it’s about
- Stephen Biviano Zapata asked the Supreme Court to review whether a federal law barring unlawful users of controlled substances from possessing firearms violates the Second Amendment.
- Who it affects
- Zapata did not get Supreme Court review of his challenge, and the Court made no ruling on its constitutional question.
Summary: written with AI from the case record.

What it's about
The Court refused to hear his case (denied the petition) and did not decide that question.
The case challenged a federal ban on firearm possession by people who unlawfully use controlled substances.
Question presented
Whether 18 U.S.C. § 922(g)(3), the federal statute that prohibits possession of firearms by a person who “is an unlawful user” of “any controlled substance,” violates the Second Amendment on its face?
Documents
Docket activity
New analysis added
AI analysis generated: Case Briefing
AI analysis generated: Decision Record
Case data updated: summary, question_presented, generation_metadata
Case data updated: question_presented, extraction_metadata
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Brief added: Petition
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.