Inmate dies at SLO County Jail

By Paso Robles Press · Mon Mar 23 2026

SAN LUIS OBISPO COUNTY — On Saturday, March 14, Trenidad Castilleja, 48, was pronounced deceased at the San Luis Obispo County Jail after being found in medical distress during routine medication distribution.

According to a press release from the SLO County Sheriff's Office, jail and health staff immediately attempted CPR and life-saving measures until paramedics arrived, but Castilleja remained unresponsive and was pronounced dead at approximately 8:59 p.m.

Castilleja had been arrested on Dec. 18, 2024, and was in custody on three separate cases, two resolved and one pending sentencing. He had a history of more than 24 prior bookings since 1998. No foul play is suspected, and the Sheriff's Office says a cause of death will be determined following an autopsy.