Original:  All of them had been raped and strangled . Relatives of Chalk told the police that after she was put on a wanted list in early November 1991, Valerie went missing.
Revised:  All of them had been sodomized and raped prior to their strangulations . Relatives of Chalk told the police that after she was put on a wanted list in early November 1991, Valerie went missing.
Edit intent: meaning-changed