two days later, she was dead. and ron and his wife, and dale, and were all under suspicion. >> they said i was a person of interest. i didn't think i had any worries. >> but agent sadar wasn't so sure. as his investigation continued, he became convinced that ron holthouse and his wife, cindy, had been telling him the truth. >> i feel awful. i really feel awful. >> but he kept encountering suspicious things like dale. why had dale waited until morning to report his wife missing? why, as dale's friends and family scour the town looking for her, why did he not take part at all? >> it was this mounting series of things we started to become concerned about. >> it was dale, said sadar, who had motive and opportunity. for one thing, the place they found her body, dale could have certainly carried her that far. >> we were struck by how close it is to the house and how