Forest Highway
Mary Ann Sarris' body was found on May 22, 1977, near Los Alamos. Laura Sue Benjamin's body was found in a culvert near Angeles Forest Highway and Big Tujunga Road in the San Gabriel Mountains north of Los Angeles. She was reported to have been a prostitute. Christiansen shot his fifth intended victim, Lydia Preston, in the head, inside his vehicle, on April 18, 1979. She escaped with severe injuries.