Drew Peterson (left) is on trial in the death of his third wife, Kathleen Savio.

Judge Edward Burmila arrives for day four of the Drew Peterson murder trial at the Will County Courthouse Friday, August 3, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Anna Doman, sister of Kathleen Savio.

Will County Assistant State's Attorney Kathleen Patton arrives for day three in the Drew Peterson trial at the Will County Courthouse Thursday, August 2, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Drew Peterson's attorneys return from lunch outside the Will County Courthouse Wednesday, August 1, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Will County State's Attorney James Glasgow (center) arrives for day three in the Drew Peterson trial at the Will County Courthouse Thursday, August 2, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Joel Brodsky. one of Drew Peterson's attorneys, arrives for the start of day three in the Drew Peterson murder trial at the Will County Courthouse in Joliet on Aug. 2, 2012. | Matthew Grotto~Sun-Times Media

Will County State's Attorney James Glasgow, after his short press conference outside the Will County Courthouse. August 1, 2012. I Scott Stewart~Sun-Times

Stacy Peterson

Kathleen Savio

FILE - In this May 7, 2009 file booking photo provided by the Will County Sheriff's office in Joliet, Ill., former Bolingbrook, Ill., police officer Drew Peterson is shown. Peterson is charged with first-degree murder in the 2004 drowning death of his former wife Kathleen Savio. Opening statements in his trial are scheduled to begin Tuesday, July 31, 2012. (AP Photo/Will County Sheriff's Office, File)

A photo taken from video shows the grave site of Kathleen Savio at the Queen of Heaven Catholic Cemetery in Hillside, Ill., on Thursday, Nov. 8, 2007. Savio was the third wife of Bolingbrook (Ill.) Police Officer Drew Peterson whose bloody and bruised bod

Will County State's Attorney James Glasgow (center) speaks with media after day four of the Drew Peterson murder trial concluded at the Will County Courthouse Friday, August 3, 2012, in Joliet. | Matthew Grotto~Sun-Times Media