Former officer testifies in Drew Peterson murder trial

By WEEK Producer

August 8, 2012 Updated Aug 8, 2012 at 10:50 PM CDT

At the Drew Peterson murder trial, testimony from Retired State Police Sgt. Patrick Collins who investigated the death of Kathleen Savio.

Collins said when he arrived at Drew Peterson's home to interview Stacy Peterson about Kathleen Savio's death, Drew Peterson was allowed to sit in on the interview as a "professional courtesy".

Collins said he had never before allowed one witness to sit in on another witnesses' interview, and never did it again and Collins testified he didn't see any signs of a struggle at the scene of Kathleen Savio's death.

"The investigation was properly done," said Peterson's attorney, Steve Greenberg. "They have no evidence that it was botched. Secondly, even if you assume there were problems with the investigation, has that led to one shred of evidence against Drew? No."

However, Wednesday afternoon, a friend of Kathleen Savio testified that Savio told her "Drew (Peterson) had held a knife to her throat and told her, 'I could kill you and make it look like an accident" and that Savio kept a knife between the mattresses of her bed for self-protection.