No. 19-8222October Term 2019Decided May 18, 2020
Mason v. United States
This case involves a petition for a writ of certiorari filed by Mason against the United States, appealing a decision from the United States Court of Appeals for the District of Columbia Circuit.
Case status
- Current stage
- Decided
- Latest event
- Decision released May 18, 2020
- What it's about
This case involves a petition for a writ of certiorari filed by Mason against the United States, appealing a decision from the United States Court of Appeals for the District of Columbia Circuit.
Question presented
Whether the “occasions” clause of the Armed Career Criminal Act, 18 U.S.C. § 924(e)(1), requires the government to prove that the prior offenses occurred on different occasions, and whether a court may look to non-elemental facts in Shepard documents to make that determination?
- Case path
United States Court of Appeals for the District of Columbia Circuit / Decision released May 18, 2020
- Area
Decided Supreme Court case
Documents
Related cases
Grounding
- Grounding
- Primary-source trail available.
- Note
- Plain-English explainer. Official filings and opinions remain authoritative.
- Checked
- Mar 30, 2026
- Method
- Methodology