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Photos: The Drew Peterson investigation
Drew Peterson is charged with killing his third wife, Kathleen Savio, who was found dead in a dry bathtub in 2004. Officials initially ruled the death an accidental drowning, but authorities reopened the case after Stacy Peterson, Peterson's fourth wife, disappeared in October 2007. Drew Peterson has not been charged in Stacy's disappearance, though he remains a suspect. He denies wrongdoing in both cases.
April 12, 2012