Martin Luther King was assassinated ten years ago today in Memphis, Tennessee. James Earl Ray pleaded guilty to that murder and was sentenced to 99 years imprisonment. David Lomax, who was also in Memphis on that fatal day, in an exclusive interview with Ray filmed in Brushy Mountain Penitentiary, examines Ray's claim that he was, in fact, an unwitting party to a conspiracy. He was, he says, induced to plead guilty, which meant that he waived his right to a full trial. Now, after nine years in jail, he's still demanding a trial so that the extraordinary assemblage of evidence can be revealed. Four out of five Americans, according to a recent poll, believe that they have not yet been told the whole truth.