Drew Walter Peterson is an American convicted murderer and former Bolingbrook, Illinois, police sergeant who was found guilty in 2012 of 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.