narrator: at the time of the debra ewing case, corwin appeared to have a solid alibi. now investigators were becoming convinced he was not only debra's killer but a serial killer. could one of the still-living victims, wendy gauntt, identify him? detectives put corwin's picture in a photo lineup to see if she could. it didn't work. if i recollect correctly, it wasn't a matter of she couldn't identify him for sure. i think it was one of those, "maybe, kind of looks like him, but i'm not sure." narrator: investigators were worried. they were convinced corwin was their killer, but they didn't have a shred of evidence. burrough: they wanted to arrest him, but the d.a. basically said, "it would be nice if you had some physical evidence." narrator: wendy's vehicle had been impounded, and forensic technicians combed every inch of it. burrough: a tech came back with a single fingerprint that was not wendy's. and so they sent it up to temple, where danny had the adolescent record. today, that takes, what, eight minutes.