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
a colorado state university, waves of students had come and gone. life had moved on. except for a few. like detective siobhan seymour who was still chasing phantom s. chasing anything she could think of, and she kept an eye on the news from out of state. there were some guy in virginia who had used duck tape at one point and time in one of his murders, and i was like maybe this is my duck tape guy. reporter: but again, and again there was nothing to find. we could ve swab everyone, we could ve asked everyone for their consent. we could ve asked reporter: the whole town? we could have, it s not realistic. reporter: the idea crossed your mind? yes. every time there was a violent sexual assault here in town, i was certain that it was my guy, until it wasn t. reporter: and, new crimes were demanding of attention.
call home. reporter: and then she focused on raising her son. amber began to accept, reluctantly, that her case would probably never be solved. i blocked it out. try to move on with my life. reporter: and then, how to say it, there was a bicycle and a pawn shop. and a small domestic drama. how curious life can be. coming up a tantalizing lead, from out of state. there was some guy in virginia who had used duck taped in one of his murders. i was like, maybe this is my duck tape guy. reporter: when dateline continues. continues. look at that! the heavy duty cloths are extra thick, for amazing trap & lock. even for his hair. wow. and for dust, i love my heavy duty duster. the fluffy fibers trap dust on contact, up high and all around