in his 50s to let him know he had reopened karin's case. would steve provide a comparison sample of his own dna? >> i told steve that if he came up and provided those samples, it could do as much good eliminating him as a suspect as it could actually pointing the finger at him. >> he agreed and within 48 hours drove to utah from his current home in nevada and freely gave up a sample of his dna. but was he worried? oh, yes, he was said his friend dick cantonwine. >> he says, they're going to try to hang me again. they just were focused in on him from day one. and they just wouldn't let go. >> and in less than two weeks after benson supplied the samples, a result. and benson looked at the name and -- >> well, i was a little confused at first. >> confused? once benson absorbed the news,