he said, talk to that kid who walk the street? she said, i see that kid all the time. he walks the neighborhood all the time. and they didn't know who he was, so billy did a vigil and it became this quest for the mythical figure for the walker. >> you can win the case for the walker. so i sat there for six weeks. >> richardson even hoped that he might find the real perpetrator, but he came up empty handed. and then before the second trial, richardson hired an investigator the renew the search, and finally, they found the mystery man, no murderer, but a high school senior who worked at the lope's supermarket. >> a kid by the name of john rupauh, and he had a habit of walking the road, and he was a big blond kid with a blond mustache. >> and it fit, fit like a glove.