who walks the street all of the time >> and they didn't know who he was, so billy did a vigil and it became this quest for the mythical figure of the walker. >> you can't win the case sitting in a 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 local supermarket. >> a guy by the name of john rupauh, who lived down the street and had a habit of walking the road in the morning. and he was a big blond kid with a blond mustache. >> and it fit, fit like a glove. >> so during the discovery, he