On Friday, July 10, 2026, at about 12:24 AM, a deputy sheriff at the West County Detention Facility was conducting safety checks when she saw an unresponsive inmate who had a ligature around her neck.
Deputies immediately began life-saving measures while Health Services medical staff at the facility responded and continued life-saving efforts. The fire department and an ambulance also responded. The inmate was later pronounced deceased at the scene.
The inmate is identified as 59-year-old Robi Lynn Perley, a white female, of Rio Vista. Perley, who had an outstanding arrest warrant for driving under the influence and probation violation, was taken into custody yesterday by the Antioch Police Department. She was booked into the Martinez Detention Facility at about 1:30 PM.
The county-wide law enforcement involved fatal incident protocol was invoked and the investigation into this in-custody death is being conducted by the Contra Costa Sheriff’s Office and the Contra Costa D.A.’s Office.
- June 26, 2026 – Sheriff: In Custody Death Investigation
- Jan 19, 2026 – Sheriffs Office Reports In-Custody Death Sunday