>> and i showed it to mr. matthews and asked him to read it. it said dna matches. >> so what's his face like when he looks at that match? >> he became pretty emotional. and he said, it was an accident, but he had killed her. >> the detective called carolyn's parents and gave them the news of the confession. >> they said, i think we got him. i said well, how sure? he said, i'll bet the farm on it. >> it was the next morning when kristen lancaster opened up the newspaper and learned her attacker had been charged with murder. >> i felt overwhelming guilt. just overwhelming guilt knowing that he had killed someone, and, you know, perhaps i hadn't tried hard enough to make people believe me. >> did you feel like i life could have been saved if you had been taken more seriously? >> oh, yes.