JOLIET, IL - An Illinois State Police trooper involved in the original investigation into the death of Drew Peterson's third wife is expected to testify at the former police officer's murder trial.
 
Bryan Falat is expected to tell jurors Wednesday he had suspicions Kathleen Savio's death was a homicide even though the lead investigator believed it was an accident.
 
Falat has said at pre-trial hearings that he had concerns about how the investigation was being conducted. The issue of a botched investigation is important for prosecutors to explain to jurors why there's no physical evidence.
 
Peterson has pleaded not guilty to first-degree murder in Savio's 2004 death.
 
Her body was exhumed and her death reclassified from an accident to a homicide only after Peterson's fourth wife, Stacy Peterson, went missing in 2007.