. >> rod hegman compared this fresh print to the print on the handrail in dorothy donovan's house. result was clear. the print belonged to gilbert cannon, and he was confronted with the evidence against him. >> well, gilbert, one thing i can tell you is you were there. it's impossible for you not to be there, gilbert. we are telling you on tape, that is your dna. no ifs, ands or buts. it's no one else's. it's a perfect match. i don't know what you were doing back then. i have no idea. we were hoping to sit down and try to get you here. because gilbert, you know -- >> a few hours later, cannon reconsidered. >> he knocked on the window of the holding cell and advised investigators that he wanted to talk to investigators. >> cannon told police on the night of the murder, he was high on cocaine and looking for more. >> cannon told police on the night of the murder, he was high on cocaine and looking for more. that's when he ran into charles holden at the fast food restaurant. holden agreed to give him a ride, but refused to take cannon all the way into town. there was a fight. cannon f