Plain-English summary
Court vacates Arizona ruling and sends case back over Simmons-change-in-law question
The Court held that the Arizona Supreme Court misapplied precedent when it concluded Lynch v. Arizona was not a “significant change in the law” allowing a successive state postconviction petition. The judgment was vacated and the case remanded to Arizona for further proceedings.
Why this matters
The decision enforces that state courts must correctly recognize when this Court’s decisions create a retroactive change in federal law that can reopen state postconviction review—especially in capital cases where procedural bars might otherwise block consideration of potentially decisive constitutional claims about jury instructions and a defendant’s future dangerousness.
Who may feel it
- People on death row in Arizona and other states with similar postconviction rules
- Defense attorneys handling successive postconviction petitions
- State courts and prosecutors in death-penalty cases
- Civil-rights and habeas practitioners tracking retroactivity and postconviction procedure
Key questions
- Does Lynch v. Arizona (2016) — which applied the Simmons rule about jury instructions on future dangerousness — qualify as a ‘significant change in the law’ allowing a successive state postconviction petition under Arizona procedure?