SACRAMENTO, Calif. (AP) — A former police officer who terrorized California as a serial burglar and rapist and went on to kill more than a dozen people while evading capture for decades pleaded guilty Monday to murders attributed to a criminal dubbed the Golden State Killer.

Joseph James DeAngelo Jr. had remained almost silent in court since his 2018 arrest until he repeatedly uttered the words “guilty” and “I admit” in a hushed and raspy voice as part of a plea agreement that will spare him the death penalty for a life sentence with no chance of parole.

DeAngelo, 74, had never publicly acknowledged the killings, but offered up a confession of sorts after his arrest that cryptically referred to an inner personality named “Jerry” that he said forced him to commit the wave of crimes that ended abruptly in 1986.

“I did all that,” DeAngelo said to himself while alone in a police interrogation room after his arrest in April 2018, Sacramento County prosecutor Thien Ho said.