The San Bernardino County Sheriff’s Department on Tuesday, March 29, identified the inmate who died Sunday at West Valley Detention Center as Federico Juarez Guardado, 30.

Guardado had been arrested March 23 on suspicion of contempt of court.

He was convicted in 2014 of a misdemeanor vandalism charge, court records show. Charges of stalking, interfering with a peace officer and trespassing were dismissed.

Guardado was found alone in a cell at the jail in Rancho Cucamonga at 6:41 a.m. Sunday, the Sheriff’s Department said. He was suffering a “medical emergency” that authorities did not describe. Despite resuscitation efforts, he was pronounced dead at 7 a.m.

Nine county inmates have died since the beginning of 2015. Eight of them were at West Valley Detention Center, while one was at the Big Bear Jail. Sheriff’s officials said three deaths were suicides, one was a homicide and five – including all four that have occurred this year – were medical emergencies.

The Sheriff’s Department is facing a lawsuit by a prisoner-advocacy group that claims the county’s jails lack adequate health care. The sheriff has said the department is making improvements.