CHICAGO – Two investigators who led what prosecutors say was an inept inquiry into the 2004 drowning of Kathleen Savio are expected to take the stand Tuesday in the Drew Peterson murder trial.

Savio’s alleged murder was at first treated as a household accident. Prosecutors have laid the blame for that on former Illinois State Police crime scene investigator Robert Deel, who they allege ruled out foul play in Savio’s bathtub drowning within 30 minutes of arriving at her Bolingbrook home.

Will County State’s Attorney James Glasgow even mentioned Deel by name during his closing argument in a 2010 pretrial hearing, telling a judge former Bolingbrook police Sgt. Peterson had staged the scene well enough to “fool” Deel.