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March 1, 2004: Kathleen Savio found dead in a bathtub. Her death is initially ruled an accidental drowning.
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Oct. 29, 2007: Stacy Peterson reported missing, a day after she fails to show up at a relative's home.
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Nov. 9: Illinois State Police declare Drew Peterson a suspect in his wife's disappearance and say they've launched an investigation into Savio's death. A judge signs order to exhume Savio's body.
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Nov. 12: Drew Peterson resigns from the Bolingbrook Police Department, where he had been an officer for 29 years.
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Nov. 13: Savio's body is exhumed for an autopsy.
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Nov. 16: Forensic pathologist Dr. Michael Baden says autopsy results on Savio's remains show she was likely murdered.
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Jan. 24, 2008: Will County state's attorney's office acknowledges that a grand jury has been convened to investigate Stacy Peterson's disappearance and Savio's death.
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Feb. 21: Savio's death officially declared a homicide.
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May 21: Drew Peterson surrenders to police on a weapons charge unrelated to the disappearance of his wife.
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November 2008: Drew Peterson meets with divorce attorney.
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Nov. 20: Gun charges dropped against Drew Peterson after Will County prosecutors refuse to hand over internal documents leading to their decision to arrest him.
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May 7, 2009: Murder indictment issued for Drew Peterson and he is arrested during a traffic stop.