Serial killer and ex-police officer who murdered 6 dies after decades on death row

A former California police officer turned serial killer who was on death row after being convicted of murdering six people in the 1980s has died of natural causes, authorities said.

Anthony Sully, 79, died Friday at a medical facility outside the San Quentin Rehabilitation Center, where he had been housed for decades, according to the California Department of Corrections and Rehabilitation.

The Marin County Coroner’s Office will determine Sully’s official cause of death, the department said in a news release Monday.