Larry Blum, the pathologist who examined Kathleen Savio's body after she was exhumed in 2007, is seen on day 11 of the Drew Peterson murder trial Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

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

Dr. Larry Blum (file)

Joseph Lopez (left) and Joel Brodsky (right), attorneys for Drew Peterson, address the media during lunch break on day 10 of the Drew Peterson murder trial at the Will County Courthouse Wednesday, August 15, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Will County State's Attorney James Glasgow (left) departs for lunch on day 10 of the Drew Peterson murder trial at the Will County Courthouse Wednesday, August 15, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Will County Assistant State's Attorney Kathleen Patton arrives for the start of day 10 of the Drew Peterson murder trial at the Will County Courthouse Wednesday, August 15, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Judge Edward Burmila arrives for the start of day 10 of the Drew Peterson murder trial at the Will County Courthouse Wednesday, August 15, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Drew Peterson

Stacy Peterson

Kathleen Savio

Will County State's Attorney James Glasgow enters the Will County Courthouse as Drew Peterson's murder trial continues, Wednesday, Aug. 15, 2012, in Joliet. Lawyers for Peterson withdrew a motion for a mistrial today, allowing the former Illinois police officer's murder trial to go ahead. The defense attorneys' move follows several blunders by prosecutors seeking to prove that the 58-year-old Peterson killed his third wife, Kathleen Savio, in 2004. He's also a suspect in the 2007 disappearance of his fourth wife, Stacy Peterson, but never has been charged in her case. (AP Photo/M Spencer Green)

Judge Edward Burmila returns from lunch break on day 11 of the Drew Peterson murder trial at the Will County Courthouse Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Drew Peterson attorney Joseph Lopez returns from lunch break on day 11 of the Drew Peterson murder trial at the Will County Courthouse Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Will County State's Attorney James Glasgow returns from lunch break on day 11 of the Drew Peterson murder trial at the Will County Courthouse Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Will County State's Attorney James Glasgow returns from lunch break on day 11 of the Drew Peterson murder trial at the Will County Courthouse Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Drew Peterson attorney Steven Greenberg returns from lunch break on day 11 of the Drew Peterson murder trial at the Will County Courthouse Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Larry Blum, the pathologist who examined Kathleen Savio's body after she was exhumed in 2007, is seen on day 11 of the Drew Peterson murder trial Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Larry Blum (center), the pathologist who examined Kathleen Savio's body after she was exhumed in 2007, is seen on day 11 of the Drew Peterson murder trial Thursday, August 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Dr. Larry Blum is seen here outside the Drew Peterson murder trial last month.