Road Rage

Ok so this past Sunday to men were arguing near a mall in Arizona. Both men were driving trucks and pulled up to a stop light. One man came out of the truck with a gun and the other man that was still in his truck pulled out his own gun when he saw the other guy get out of his vehicle. The man that was still in his truck shot and killed the other guy. The police interviewed him and said it was self defense and let him go on his way. What do you think? Self defense ? Please comment

If you don't think it is true do a search for San Tan road rage