A man convicted of rape and murder walked out of prison after 17 years as the results of a DNA test led to another culprit, NBC News reported. Jamie Lee Peterson was sentenced to life in prison after his conviction of the 1996 rape and murder of 68-year-old retired schoolteacher. A judge last month ordered a new trial for Peterson based in part on DNA evidence tested last year that implicated another man, Jason Ryan, in the murder, who now awaits trial. No DNA found at the scene matched Peterson.