drew walter peterson (born january 5, 1954) is a retired bolingbrook, illinois police sergeant who was convicted in 2012 for the murder of his third wife, kathleen savio, a few months after their 2003 divorce. peterson first received national publicity in 2007 when his fourth wife, stacy ann cales peterson, disappeared. although the police and stacy ann's family suspect foul play, she has never been found.