I'm going to put this here because I've been thinking of looking up this case for a while. The guy was convicted for the three deaths as well as the kidnapping and rape of another gal. He was tried but not convicted of two other murders, but I haven't finished reading yet, so I'm not sure why he wasn't found guilty for those.
Here are the court docs:
http://www.courts.ca.gov/opinions/archive/S012279.PDF