detective thought the crude comments had a broader meaning. speaking to the bff relationship of debra and melissa. >> does he feel like he's been tossed out of the house, because melissa has taken his place? >> i think he definitely believes that melissa was a catalyst to enable debbie to go forward with a divorce. he kills melissa lewis to get back at debora for divorcing him. >> but if you are legally angry about an impending divorce, why not kill the wife? >> if you kills melissa and he is caught, debbie is still there to raise their kids. >> although tony would later deny, it never told detectives he had been violent with her and her kids in the past. because of that, denver said, she had decided, on her own, that tony had to go. >> you thought he was physically going to hurt the kids? >> oh, he is already physically hurting. them i thought he was going to go too far. >> debra was scared of tony but didn't raise any suspicion as to why he would want to ever harm melissa.