investigators called state attorney angela corey, then an assistant prosecutor. >> the police were all there when i arrived, and so they walked me through the scene. >> reporter: how hard was it seeing corey parker in that way? >> it was brutal because you could tell that she had fought for her life. you could tell that she was at her most vulnerable. alone and in bed and that she had been, you know, brutally and viciously stabbed in the middle of the night. >> reporter: stabbed more than a hundred times. this was a sick individual who did this. >> very, very. >> reporter: it didn't take long for word of corey's death to spread from the tiny apartment. amy lavin, still visiting her mother out of town, got a call from corey's boyfriend. >> he was crying. and he said, did you hear what's going on? i'm so confused. i said no. what's wrong? everything's fine. and he said, corey, there's something wrong with corey. somebody found her in blood. and i said, no! no, she's fine. i talked to her yesterday. everything's fine. >> reporter: still, she drove back to jacksonville beach, straight to t

state attorney angela corey. so this wasn't solved after the commercial break? >> oh, no. no, no.ing we were in for the long haul. with that phrase we knew it was going to be a marathon, not a sprint. >> reporter: they had their list of possible suspects, but they didn't have the evidence or the science yet to definitively link anyone to the crime. >> dna testing was actually in the middle of evolving at that time. >> reporter: eventually the science and the evidence came together. investigators recovered a strand of foreign hair from corey's underwear. they believed that single strand was rich in dna. >> it had been clearly ripped out of a head. >> reporter: likely, they believed, the killer's head. now they had to test it against their possible suspects. you essentially had your killer in your test. >> locked in a tube. >> reporter: didn't know his name? >> hairs on slides, that's right. >> reporter: that's when the case took its most dramatic turn yet. thanks to this man. would you call yourself a bounty hunter? >> i've been called bounty hunter before, but i'd prefer fugitive