Very ugly situation. If one was situationally aware of a man approaching the truck, now is the time to have a gun drawn and ready. A stranger approaching my truck at an intersection would be cause for concern. You could make a strong argument that you shot him when he pulled his weapon "because you feared for your life". If you got out of the vehicle, didn't get shot, or shot at. And then shot the car jacker in the back of his head, now your in a very tough place to legally defend yourself. You can defend yourself (and in some states your property) but you can't shoot a fleeing criminal. That's where manslaughter/ murder2 comes in.
And Jason, you sound painfully ignorant. Good luck.
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