Los Angeles County Deputy District Attorney Habib Balian filed the complaint this morning in Alhambra Superior Court, asking that Gerhartsreiter be extradited from Massachusetts, where he is in prison for kidnapping.
Gerhartsreiter was convicted in June 2009 of absconding with his 7-year-old daughter during a supervised visit and assaulting a social worker with a dangerous weapon when the man tried to protect the little girl.
In the new charge, Gerhartsreiter is accused of murdering John Sohus, 27, who was last seen in early 1985.
At the time, Gerhartsreiter, then calling himself Christopher Chichester, was living in the Sohus family guest house at their San Marino home, police said. Shortly after John Sohus disappeared, so did Chichester.
In May 1994, a body was discovered buried in the backyard of the Sohus home, and the remains were later identified as those of John Sohus. An investigation determined he was killed by blunt force trauma to the head.