The young and ambitious district attorney Peter Hudson is convinced that the defendant Andrew Barnes in his current case is guilty, and that winning the case could help him much on his way to become vice-governour of Philadelphia. So he doesn't think twice about influencing witnesses. Only five years later - now head of the Department of Public Prosecution - when he receives a pledge for retrial, he gets doubts and starts investigating again... even risking his career. Written by Tom Zoerner