9th Cir.

Rienhardt v. Thornell

June 15, 2026 ·4:03-CV- ·Published ·Danielle J. Forrest · By Aisha Johnson

The Ninth Circuit affirmed the denial of a habeas corpus petition challenging a death sentence for murder and kidnapping. The panel held that the petitioner failed to develop the factual basis of his claims in state court and could not show prejudice from his trial counsel's performance.

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Background

Charles Rienhardt was convicted of first-degree murder, kidnapping, and other felonies in Arizona and sentenced to death. He filed a federal habeas petition challenging his conviction and sentence, raising claims of ineffective assistance of counsel regarding his trial attorney’s handling of a witness, a romantic interest in a potential witness, and failure to present mitigation evidence.

The court’s reasoning

The panel applied 28 U.S.C. Section 2254(e)(2) and Shinn v. Ramirez, holding that Rienhardt failed to develop the factual basis of his claims in state court. Consequently, the court could not consider new evidence or allow development of the state record. The panel reviewed the certified claims under Strickland v. Washington and found no prejudice. Regarding the attorney-as-witness claim, the court found no reasonable probability of a different result given the overwhelming evidence against Rienhardt. Regarding the attorney-romance claim, the court held the claim was procedurally defaulted and not excused.

What it means going forward

The decision reinforces the strict limitations on federal habeas courts considering new evidence when a petitioner fails to develop the record in state court, following the Supreme Court’s ruling in Shinn v. Ramirez.