A Republican California sheriff must return more than a half-million ballots he seized for an investigation into unfounded voting improprieties in a special election last year, the state Supreme Court ruled Thursday.

Riverside County Sheriff Chad Bianco in February seized approximately 650,000 ballots from a November 2025 special election on statewide congressional redistricting favorable to Democrats and pushed by Gov. Gavin Newsom. The measure easily passed statewide, and won in Bianco’s county by roughly 80,000 votes.

The court called the ballots’ seizure “unlawful,” saying California law requires voted ballots to remain in the custody and control of election officials, even during a criminal investigation. Bianco must also “refrain from further handling of the ballots except as necessary to comply with our order,” the court said in an unanimous decision. Bianco did not immediately comment on the ruling.