maintain my innocence for the rest of my life. >> he can stick to his story all he wants, but there's nothing that supports it, certainly none of the evidence we found. >> he wanted it all -- the kids. he didn't want to lose the kids, he didn't want to lose the house. he didn't want to lose nothing! those things he would have lost if he had gotten divorced, and he knows that. >> prosecutors don't think david's girlfriend, linda ryan, had anything to do with the murder, but questions about the case remain. why did david fire the second shot? >> did something that happened that night that angered him so much that he wanted to walk into the bedroom, absolutely hold the gun to his wife's head and shoot her not once but shoot her twice and then say it was a suicide? it just doesn't add up. i don't know if i'll ever be able to answer that question. >> forensics were the case. if we don't get dna off that