the problem had a name-- noel stevens, "greyhound." on: sure. --but he's also the biggest risk. in the credibility sweepstakes, he's way down here somewhere-- absolutely. keith morrison: --and your defendant is way up there. and so they argued, these two prosecutors. she said, put him on the stand. my thought was you don't understand who george is and how sinister this was until you meet noel and say, this is the person that he gave access to. keith morrison: he said, don't take the chance. they could say, this crazy, psychotic, homeless man did it on his own. keith morrison: who prevailed? she did. man 2: they called noel stevens. keith morrison: and so up went "greyhound" to the witness stand, and offered his grisly story. i hit her in the head. robert langford: when you hit her in the head, what happens? she hits the floor. robert langford: and after she hits the floor, what do you do? i jump on top of her. robert langford: and after you jump on top of her, what do you do? keep on hitting her. robert langford: how long do you hit her