cheely and doug gustafson and charged them with jeffrey cain's murder. george kerr accepted a plea bargain and agreed to testify for the prosecution in exchange for immunity. without the murder weapon, he was their entire case. >> george kerr was very important to the prosecution. without george kerr, it would have been very difficult i think to put them at the scene, and to actually have an eyewitness who witnessed not only the shooting but what happened before and after. >> but as the trial was about to begin, george kerr changed his story. >>> police had two men in custody for the shooting death of jeff cain based on information provided by their eyewitness, george kerr. kerr initially said that doug gustafson fired an assault rifle at jeff cain from approximately ten yards away, which killed him instantly. but soon kerr changed his story. >> it wasn't like an aim thing. it was just pointed in the general direction of the car. >> he now claimed that gustafson pointed the gun out the window and fired a shot from 200 yards away, which hit the car. >> i