Sonny Pierce, 27, 'battered teen to death and filmed himself having sex with her corpse' may have killed more than three - 22nd Apr 2011

Police fear a man who is accused of killing three teenage women and videotaping himself having sex with the corpse of one of the victims may have killed before.

Sonny Pierce, 27, is accused of luring Kiara Windom and Kimika Coleman, both 18, to his Chicago apartment before strangling them and dumping their bodies in alleys.

Prosecutors say that while they were searching the father of one's Blue Island home on the unrelated rape a 15-year-old girl, they discovered a recording of Pierce having sex with the dead body of Mariah Edwards, 17 - who was beaten to death by a gang of his friends.

Cook County State's Attorney Anita Alvarez, pointed to 'pattern' of behaviour that allegedly stretched for about a year before Pierce's arrest in July last year for the strangulation and sexual assault of the 15-year-old.

Cook County State's Attorney Anita Alvarez said: 'We would like to hear from anyone out there who has had previous contact with Pierce or any other young woman who may have been potential victims, or any families who are missing a loved one.

'It is our obligation to try to identify any other women who may have been victimised.'

Investigators said the body of one of the women Pierce is charged with killing has never been found, and it took nearly a year to identify the remains of a second victim.

This leads those working the case to think there might be additional victims.

According to police the killings once again underline concerns about the safety of young women who use social media websites and chat lines.

Chillingly Pierce apparently met two of his alleged victims on telephone chat lines, speaking to Windom up to 20 times.

Investigators first interviewed Pierce in 2009 in the slaying of Coleman. Read More