so he turned to gustafson and said shoot that mother [ bleep ]. >> he claimed gustafson raised the rifleingle shot towards the car. kerr claimed he didn't know anyone had been hurt until he read the newspaper. >> did he actually aim it like a rifle? >> it was really quick. i don't know. i was sitting in the back and i was telling him you don't want to do that. i still didn't think he would do it. >> george kerr's story of the shooting is very credible because by that time we had worked this crime scene and the highway all night. it was very consistent with what we had. and he definitely had information that hadn't been released to the media. >> kerr claimed he didn't know what gustafson did with the rifle after the shooting. investigators weren't entirely convinced that kerr would testify against his friends in open court. >> i'll be honest with you, i never trusted george, you know. he is one of these -- he's going to flip on you. he is going to flip-flop because on the one hand, he would go oh, how terrible this was, and this kid didn't deserve to die, to the other turn talking about t