No. 20-1009October Term 2020Decided May 23, 2022Updated May 24, 2026
Shinn v. Ramirez
Shinn v. Martinez Ramirez
This case involved two Arizona death row prisoners who argued in federal habeas proceedings that their trial lawyers were ineffective, even though those claims had not been properly developed in state court.
Case status
Decided 6-3 · May 23, 2022 · Opinion by Justice Thomas
Read the opinion (PDF)- Current stage
- Decided
- Latest event
- Decision released May 23, 2022
- What it's about
This case involved two Arizona death row prisoners who argued in federal habeas proceedings that their trial lawyers were ineffective, even though those claims had not been properly developed in state court. The Supreme Court considered whether a federal court may look at new evidence outside the state-court record when the procedural default is excused because the prisoner’s state postconviction lawyer was ineffective.
Question presented
Does application of the equitable rule this Court announced in Martinez v. Ryan render 28 U.S.C. § 2254(e)(2) inapplicable to a federal court's merits review of a claim for habeas relief?
- Case path
United States Court of Appeals for the Ninth Circuit / Decision released May 23, 2022
- Area
Criminal Procedure
Timing
Decided May 23, 2022
The Court released its decision on May 23, 2022 without hearing oral argument.
Documents
Activity
Docket activity3
Brief added: Questions Presented
May 24, 2026 | Court records
Opinion added: opinion
May 23, 2022 | Court records
Brief added: Petition
Jan 20, 2021 | Court records
Related cases




Grounding
- Grounding
- Primary-source trail available.
- Note
- Plain-English explainer. Official filings and opinions remain authoritative.
- Checked
- Jul 25, 2026
- Method
- Methodology