San Diego sheriff’s deputies failed to take reasonable measures to protect a low-level sex offender when they put him in a jail cell with a high-level violent offender, the county’s civilian oversight board has ruled. The low-level sex offender, a 56-year-old man named Derek Thomas Baker who was sent to jail for failing to properly register, was beaten to death in March 2022 after he was housed alongside Patrick Ferncase, who had been arrested on suspicion of attempted murder, assault with force and elder abuse. “Me and my celly, we weren’t getting along, (he) kept calling me names and whatnot,” Ferncase later told investigators, according to a finding adopted this past week by the San Diego County Citizens’ Law Enforcement Review Board, or CLERB. “One thing led to another and we ended up boxing, and he’s a different race so I ended up stomping him out,” he said, according to the report. The oversight board found the Sheriff’s Department did not protect Baker, in the latest finding in a series of jail-death investigations concluding that deputies failed to follow adopted standards. “The (department) failed to implement