CHICAGO (Reuters) - Prosecutors on Wednesday charged a man with the murders of three teenage girls he met on telephone chat lines and asked the public for help identifying what they fear are other victims of the serial killer.
Sonny Pierce, 27, was charged with three counts of first degree murder in the deaths of Mariah Edwards, 17, Kiara Windom and Kimika Coleman, both 18. Pierce has been linked to two of the victims through DNA evidence and the third through a videotape.
Pierce has been in custody since last August on a separate aggravated criminal assault charge involving a 15-year-old girl.
In two of the murders, investigators allege that Pierce had sexual relations with the victims before killing them.
But in one case, Pierce allegedly videotaped himself having sex with the lifeless corpse of his victim after he first raped the young girl in front of friends and had them help beat her to death, prosecutors said.
"Police and prosecutors believe the man may be a serial offender," Anita Alvarez, Cook County State's Attorney, said in a statement, "and are seeking the public's help in providing information on other potential victims."
Pierce appeared in court on Wednesday and was denied bond.
(Reporting by James B. Kelleher)