here's josh mankiewicz. >>> detective ron parmertor always knew who killed lisa knoefel and now he thoughtrstood why. sabrina had told parmertor lisa was about to crush her dream of remaining part of the knoefel family. >> she hated lisa. >> that feels to me like a motive. >> absolutely. >> i hated lisa, but it was only because she was triggering a lot of past issues. >> but there was more. there was, said sabrina, someone else. >> it's not all my fault. now, i take responsibility because i did what i did, and i know it was wrong, but if it weren't for him, it would not have happened. >> if it weren't for him. sabrina was referring to her foster father, kevin. >> i was doing what kevin told me to do. that's what it comes down to. >> it was an astonishing accusation. sabrina told ron parmertor kevin had grown to hate lisa even more than she did. it was a feeling, she said, kevin shared with her slowly over several months. >> started through texts. man, i wish she was dead. or i can't stand her. she just needs to go. >> according to sabrina, kevin also revealed that lisa had multiple life in