. >> sure enough the lost wallet belonged to a fellow named shawn buckner. >> shawn buckner was a close friend of pat cone. the prosecutor's star witness. the letter and buckner's lost wallet called cone's testimony into question. >> that letter talks about pat's doubts. pat kind of hoped shawn buckner and his fiance about his doubts to the point where they wrote each other a letter about it. >> richardson flew to louisiana where buckner was training in the air force when he got there buckner closed the door on his face. >> he didn't want to get involved. >> shawn buckner didn't know whether to betray his friend or help free someone who may be wrongly accused of triple murder. it was a tough one. shawn buckner had no reason to help tim hennis. >> richardson came home empty handed, hoping buckner would eventually change his mind. the retrial of timothy hennis began on february 27th, 1989. almost four years after the brutal murders of gary eastburn's wife and daughters. >> the state went into a replay of trial one. meanwhile the defense had an entirely different case. >> this time hennis

pat cone told shawn buckner and his fiancee about his doubts to the point where they wrote each other a letter about it. >> richardson flew to louisiana where buckner was in training with the air force. but when he got there, buckner closed the door in his face. >> he didn't want to get involved. >> shawn buckner had to decide whether to betray his friends and free someone who may be wrongly accused and that was tough. shawn buckner had no reason to help tim hennis. >> richardson came home empty-handed hoping buckner would eventually change his mind. the retrial began february 27th, 1989, almost four years after the murders of gary eastburn's wife and daughters. >> the state thought it would be a replay of trial one. the defense had an entirely different case. >> this time hennis would testify. >> we just really drilled him and filmed him and let it watch it. >> did you kill these three people? >> no, i did not kill these people. i have a daughter of my own and i could not hurt any children at all. >> did you do this crime? >> no, i did not. >> we felt if he showed rage or emotion, th