Peterson investigation Bolingbrook police Sgt. Drew Peterson is a suspect in the disappearance of his fourth wife Stacy, 23, who has been missing since Oct. 29. Authorities have also re-opened an investigation into the death of  his third wife, Kathleen Savio. Prev   •   Next   RELATED STORIES • Spouse under scrutiny • Friend: Missing woman unhappy • Court filings tell story • Search team needs help • Drew Peterson called to grand jury • Sgt. Peterson's brother called to testify • Pathologist: Autopsy might not help case • Peterson's third wife exhumed • 'Terrible things' unite families of 2 wives • THE PETERSON CASE: Drew's history of cheating • Hundreds turn out for Peterson vigil