course, she knew so much more than she had a decade before, knew, for example, that then detective jared fuhriman who ran the interviews had been a school resource officer, well-known to a young chris tapp. >> i trust you, and hopefully you trust me, okay? >> fuhriman kept telling chris, just trust me, chris. you've got to trust me. you know, 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 an active participant. >> let's say, for example, hypothetically, chris, you were there. okay? >> okay. >> hypothetically, chris, how do you think it happened? and i remember chris saying, you mean like a tv show? >> next she saw police administering polygraph after polygraph and almost always with the same result. they would tell him he was deceptive, and how 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