even darlie wrote me a letter and say you have to think of what you are doing. i have to admit i wrote and said you're the one on death row, you need to think about what you're doing. >> the polygraph wasn't the only revelation about darin. pardo also hired a private investigator who discovered that before the murders, darin suggested hiring someone to rob his house so he can collect insurance money. >> he had come up with a screwball plan. he had one insurance scam with a car and got the money for the car. >> in a signed affidavit darin admitted to the car scam and the plot for a home robbery. >> i've known darin since he was 15 years old. possibly you could get me to believe that he set it up for a robbery, because he talked about that. he would never hurt his children or hurt darlie, never.