Former Bolingbrook police officer Drew Peterson went to trial Tuesday on charges he killed his third wife. Peterson was indicted in Kathleen Savio's 2004 death after his fourth wife, Stacy Peterson, went missing in 2007. A brief synopsis of what has happened in the case:
March 1, 2004: Kathleen Savio found dead in a bathtub. Her death is originally ruled an accidental drowning.
Oct. 29, 2007: Stacy Peterson reported missing, a day after she fails to show up at a relative's home.
Nov. 9, 2007: Illinois State Police declare Drew Peterson a suspect in his wife's disappearance; they also say they've formally launched an investigation into the 2004 drowning death of Kathleen Savio, saying it does not appear to be an accident as originally determined.
Nov. 9, 2007: Judge signs an order to exhume Savio's body.
Nov. 12, 2007: Drew Peterson resigns from the Bolingbrook Police Department, where he's been an officer for 29 years.
Nov. 13, 2007: Savio's body is exhumed and an autopsy is conducted.
Nov. 16, 2007: Forensic pathologist Dr. Michael Baden conducts autopsy on Savio's remains at the request of her family; says it looks like she was murdered.
Jan. 24, 2008: Will County state's attorney's office acknowledges publicly for the first time that a grand jury has been convened to investigate Stacy Peterson's disappearance and Savio's death.
Feb. 21, 2008: Will County state's attorney announces that Savio's death officially declared a homicide.
May 21, 2008: Peterson turns himself in to police on a weapons charge unrelated to the disappearance of his wife. He was released from custody after an adult son posts a 10 percent bond.
November 2008: Peterson meets with divorce attorney.
Nov. 20, 2008: Gun charges dropped against Peterson after Will County prosecutors refuse to hand over internal documents leading to their decision to arrest him.
May 7, 2009: Murder indictment issued for Peterson; Peterson arrested during traffic stop.
May 18, 2009: Peterson pleads not guilty in Savio's death.
May 22, 2009: Judge refuses to reduce Peterson's $20 million bail after prosecutors claim Peterson tried to pay somebody $25,000 in 2003 to kill Savio.
January 2012: Cable television movie "Drew Peterson: Untouchable," starring actor Rob Lowe, airs.
April 12, 2012: Illinois appellate court allows some hearsay evidence at Peterson trial, defense attorneys decide not to appeal.
July 24, 2012: Will County jury selected in Peterson trial.
July 31, 2012: Prosecutors, defense attorneys give opening statements, testimony begins at first day of Peterson trial.