Los Angeles police have released a composite sketch of a man believed to have killed at least 11 people since 1985.
The sketch released Tuesday was originally compiled in 1988 after a woman who survived a brutal assault gave a description of a man in his 30s.
Police hope to use age-enhancement techniques to bring the sketch up to date.
Police believe the man struck at least 11 times between 1985 and 2007, killing 10 women and a man. He was dubbed the "Grim Sleeper" because he apparently took a 14-year hiatus from his crimes.
All the killings were connected using DNA or ballistic evidence.
All the victims were black and were found in or near South Los Angeles. Police believe some of the women were prostitutes.
Seven women and a man were killed by the same handgun in a three-year period starting August 1985. The women had been sexually assaulted and their bodies were often dumped in the same alley in South Los Angeles.