Peterson is also a suspect in the disappearance of his fourth wife, Stacy Peterson, who has been missing since 2007. Stacy's disappearance led police to reopen the Savio case.
- March 2004: Kathleen Savio, 40, is found dead in a dry bathtub. Her hair is soaked in blood. Death ruled accidental.
October 2007: Stacy Peterson, 23, goes missing. Search focuses on Illinois- Michigan Canal near Lockport Lock. Believing foul play is a factor, Stacy's family wants her husband, Drew Peterson, to take a lie detector test. Drew Peterson denies any wrong doing, says Stacy ran off with another man.
November 2007: Drew Peterson named suspect in Stacy's disappearance. Peterson resigns from Bolingbrook Police Department.
November 2007: Savio's body exhumed from grave. Case reopens.
December 2007: Search for Stacy focuses on blue containers
February 2008: Savio case investigated. Pathologist rules the death of Peterson's third wife was a homicide. Peterson denies involvement in Savio's death, Stacy's disappearance.
March 2008: Savio's divorce attorney says he was contacted by Stacy before she disappeared.
April 2009: Savio family sues Peterson.
May 2009: Peterson arrested, indicted in Savio's death.
June 2009: Judge wants to lower Peterson's media profile.
August 2010: Peterson letter not easy being "national pastime" printed in Chicago Sun-Times
June 2011: Peterson offers woman Stacy's clothes in love letter.
January 2012: Rob Lowe portrays Drew Peterson in TV movie, "Drew Peterson: Untouchable"
April 2012: Court allows hearsay evidence in Peterson trial
July 2012: Jury selected in Peterson's murder trial.
September 2012: Peterson found guilty in Savio murder