A child shouldn't be carrying a gun. But it doesn't matter if it's a kid or not, if he is pointing a gun at a police officer, the officer has the right to shoot him.
First off, what a piece of scum disguised as a man. Second, how unfortunate for the wife. I thought it was going to end with the girlfriend getting stabbed.
What in the actual hell is wrong with people? Clearly he is incredibly disturbed. I would have sentenced him to institutionalization vs prison, this man is sick!