absolutely. >> not according to detective parmertor.convinced there really was a plan between her and kevin? >> yes. >> and that there was affair, despite the lack of hard evidence. she had no proof. there's no love letters. >> no. >> there's no photographs, there's no videotape? >> no. >> how do you know it happened? >> took sabrina on her word. every time we interviewed sabrina, she always told us the same story. >> and it rang true? >> absolutely rang true. >> and parmertor said he was suspicious of kevin even before sabrina came forward. several weeks after the murder, parmertor asked kevin to come to the station for an interview. kevin brought along his attorney. >> he would only answer the questions about his wife's work. >> and nothing about the murder? >> nothing about the murder. >> parmertor also became suspicious of how kevin began filing claims for lisa's $800,000 in life insurance within hours of lisa being pronounced dead, and then he started spending the money. >> he was buying cars. he was buying a camper. he was remodel