she told me, you know, if you can't find her, come over later and i'll help you find her. >> kristen steinhoffhat is critical to where we want to go in this case. >> back in 2000, kristen gave police information about nick that seemed greatly contrary to everything he had told police about his relationship with leah. that he was loving and concerned. >> we smoked dope and everything else, crack heads, i don't know, tweakers, we can't really tell the timing. >> where did you -- can i ask you where you smoked the meth that night? >> in my bedroom at home. he just tried to kiss me. >> did he grab a hold of you or -- >> he tried to have sex with me and then i told him he had to stop. >> kristen was very valuable to this investigation, very valuable to us. do we ever get a complete or she opened up to us? i don't think we did, but we got enough that brought discredit to what nick was saying. >> i'm not going to sugarcoat it. when i got there, you know, one thing led to another, her and i started kissing. it's not a proud moment. definitely not a proud moment. but we stopped. kristen and i never had