in, they said they heard screams coming from the park. she was found naked and bound with red duck taped. when you see the photos, you can feel the terror. he left her for dead. we were shocked. as a dna laboratory that there were no other offenders. how is this guy not in the system? then, one day, you ve got a call. they said there s been an update on the case. it was like finally. i ve been thinking about who this guy was for so long, i don t think anything could have prepared me for that answer. how do you wrap around mind around the fight that someone you trusted this. i can picture him smirking. a second customization? yes. might screw up. what kind of person does that kind of thing? exceptionally sick, evil. reporter: the evening arrows warm and thick with anticipation. college students, returning a new, mix and drank with young locals. darkness fell on colorado. one more night to take a lusty bite of the flooding summer. that last friday
under the door to figure out what the vantage point was that stefan moon claimed he had, and you couldn t see anything under the door besides a heel in front of you. reporter: then they tracked down bryce bailey, told him what sam said. how did bryce react to this? he was disgusted. and surprised. that is ridiculous. really? did you have anything to do with the incident that happened to amber in 2013? no. i didn t even know amber in 2013. reporter: so why would his pile sam try to frame him for the attack on amber? that was easy, said bryce. one, he is scared, or to he is trying to get revenge on me for getting him in trouble. oh, yes, he stole prices bike, remember.
were certain they had their man. but, as the trial approached, the victim herself, amber smith, was not so certain. she routinely asked us are you guys sure? are you sure this is who did it. how do you wrap your head around the fact that the person you trusted something like this? reporter: amber, after all was slighted to be their star witness. and they needed her to help seal the case. here, for the first time, since that night in the park. she would finally confront sam moon, face to face. coming up even on the eve of the trial, amber wasn t convinced sam was her attacker. i still questioned. i still couldn t believe it. reporter: would she have it in her to testify? i was overwhelmed. reporter: when dateline continues. continues. it s the only migraine medication
read or anything like that? or did they say, say what you want. they had a white board. and if i were to get stuck they were gonna write questions to help me. reporter: even as the phone rang, amber was still deeply conflicted. could she do it? could she really accuse him? if she did, would she be right, or wrong? sam answered, apparently, no idea what was happening. hey, is the same? it is. amber and sam hadn t talked in a while. for a minute, it was like old times. hey, it s amber. amber smith? yeah. what s up? not much. how are you? reporter: then, she dove in. so remember how i told you about that stuff that happened to me in 2013 about that guy that broke my jaw and stuff? yes. yeah, so the police contacted me and said your dna matched up.
that s when things happened, said sam. very bad things. and it was just screaming and yelling in there. until it stopped and i thought that he killed her. sam said he hid in his room the door closed. so i looked under the door and watched him carry her out, he had her over his shoulder. her whole head was covered in red. it was also bloodied. reporter: but sam didn t report his roommate to the police. the next day i asked did you had fun with somebody last night and he beat the [bleep] out of me, and he said that he killed her and i m next if i say anything. reporter: quietly in her almost gentle way detective seymour pushed back. some of the stuff isn t