'Golden State Killer' suspect faces more charges

The Santa Barbara district attorney added four counts of murder in the case of Joseph Deangelo, 72, the suspected serial killer accused of terrorizing California in the '70s and '80s.
2:00 | 05/11/18

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Transcript for 'Golden State Killer' suspect faces more charges
Now to new developments in the golden state killer case. Joseph Deangelo is facing new charges this morning, four counts of murder in Santa Barbara, 12 murder charges now in all. ABC's whit Johnson has the latest. Reporter: This morning, a wave of new charges piling up against Joseph Deangelo. The suspected serial killer accused of terrorizing California in the '70s and '80s. The Santa Barbara district attorney slapping the 72-year-old former police officer with four additional counts of murder. Violent cold cases never glow cold for victims or their loved ones. Reporter: The new charges stemming from two brutal cold cases including the 1979 murders of Dr. Robert Offerman and Debra Alexandria manning. William and Joan Oakley were supposed to play tennis with the pair the next morning. Instead they say they discovered their friends' bodies inside their condo. I still if I ever see a light on on a porch and it's in the morning, I always think of Bob and, you know, it bothers me. It brings back a lot of memories. Reporter: Authorities also charging Deangelo with the 1981 double murder of Gregory Sanchez girlfriend sherry Domingo and now law enforcement agencies across the state are digging deep into their files reportedly looking into whether Deangelo could be linked to other crimes like the Cordova cat burglar attacks in the early '70s near eastern Sacramento. So we know that there are allegations of him being prolific. Now it's a matter of finding out if we know about everything and then really finding out about the details of each one of those. Reporter: Now, Deangelo remains behind bars without bail in Sacramento. Sources tell us prosecutors were able to obtain photographs of Deangelo's body, fingerprints and additional DNA. He's expected back in court on Monday. Michael. All right, thank you, whit

This transcript has been automatically generated and may not be 100% accurate.

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