Inmate dies at SLO County Jail. What happened?

An inmate died at the San Luis Obispo County Jail on Saturday, the Sheriff’s Office confirmed.

Forty-eight-year-old Trenidad Castilleja was in medical distress as medication was being dispensed at the County Jail, according to a news release Sunday.

Custody and nursing staff performed CPR and offered medical aid until paramedics arrived, but Castilleja was pronounced deceased by paramedics at 8:59 p.m.

The cause of death is unknown until an autopsy can be performed, the release said, but no foul play was suspected.

Castilleja was arrested by SLO police on Dec. 12, 2024, and has been in custody due to three separate cases, two of which were resolved, according to the release.

Castilleja was pending sentencing on the third case at the time of his death, the Sheriff’s Office said. He had a history of being booked into the jail “with more than 24 such occurrences” since 1998, the release said.

His next of kin has been notified, the Sheriff’s Office said.