DNA evidence linked Chester Turner to the four additional murders, prosecutors said Tuesday.
Turner, 44, will be returned from state prison to face the new charges, but an arraignment date hasn't been set.
Turner was sentenced to death in 2007 for murders committed over an 11-year period in Los Angeles.
The four killings detailed in the new charges occurred between 1987 and 1997, and included the 1992 slaying of Mary Edwards and the 1997 death of Cynthia Johnson. All four victims were strangled.
David Allen Jones was convicted of killing Edwards, but further DNA testing excluded him from the murder. He was freed from prison in 2004.
Another man was charged with Johnson's murder but the case was later dismissed after DNA evidence showed Turner was the killer, prosecutors said.