course, she knew so much more than she had a decade before, knew, for example, that then detective jared furhman the interviews had been a school resource officer, well known to a young chris tapp. >> i trust you and hopefully you trust me, okay? >> furhman kept telling chris, just trust me, chris. you have to trust me. we go way back, chris. and i think that he was taught to respect adults and he was a follower. >> she watched as chris insisted he knew nothing and then she saw detectives, as they're trained to do, subtly make tapp. >> hypothetically, chris, how do you think it happened? >> i remember chris saying, you mean like a tv show? >> next she saw police administering polygraph after polygraph, almost always with the same result. they would tell him he's deceptive. when tapp was promised immunity, his story about ben hobbs changed. >> he got a knife. and he just started to cut her. >> but perhaps what troubled carol most was seeing how confused tapp was, even ten days after his first interviews, he still seemed not to know what house angie lived in. >> did she live on the corner? >> poli