heidi and steve did have a fairly new desktop computer, and that was never seized by the police. so to this day we have no idea what that hard drive on the home computer would ve shown? no. so your guy is being charged with a contract killing but nobody can product the contract? no. reporter: not only did investigators not have any computer records, they didn t have a record of bennet s plane ticket, phone records, credit card receipts. eyewitnesses who saw bennett and cooke together not even the murder weapon. stephen s sister, kim. all you have is a confessed murderer s words. that s all. there s not one piece of evidence in this whole entire trial that points to stephen, other than the confessed murderer and these detectives with, oh, their belief. reporter: and when it came to motive they turned the case on its head. the defense version this isn t about stephen searching for a contract killer online,