Drew Peterson murder trial under way in Illinois

Associated Press
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FILE - In this July 23, 2012 file photo, Will County State's Attorney James Glasgow leaves court during a lunch break on the first day of jury selection in former Bolingbrook, Ill., police officer Drew Peterson's murder trial in Joliet, Ill. Glasgow will be the lead prosecutor when opening statements begin Tuesday, July 31. Peterson, 58, is charged with killing his third wife, Kathleen Savio, in 2004. (AP Photo/M. Spencer Green, File)

JOLIET, Ill. (AP) — Prosecutors have begun delivering their opening statements in the murder trial of former Illinois police officer Drew Peterson.

Will County State's Attorney James Glasgow told jurors Tuesday that the former Bolingbroke officer killed his third wife, Kathleen Savio, in 2004 and made it look like an accident.

Peterson is charged with first-degree murder Savio's drowning death. He is suspected but not charged in the 2007 disappearance of his fourth wife, Stacy Peterson.

A botched initial investigation into Savio's death leaves prosecutors with scant physical evidence. They'll rely on circumstantial and normally barred hearsay evidence to convince jurors of Peterson's guilt.

Peterson was only charged in Savio's death after his fourth wife's disappearance.