. >> kerr said he and his two friends, r.d. cheelyafson, bought an assault rifle earlier in the day. later, when they were driving home, a car cut them off on the highway. >> just pissed r.d. off. so he turned to gustafson and said shoot that mother [ bleep ]. >> he claimed gustafson raised the rifle and fired a single 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