"Let me start by saying that no one in this situation did anything wrong. The cop was trying to make sure a boy wasn’t going to kill himself. The homeowner was legally defending his residence from a suspicious intruder approaching the back door of his house. Some frazzled nerves, poor training, or a couple more pounds of pressure on either weapon’s trigger would have resulted in a tragic outcome.
How do we prevent situations like this from going bad?"
Go read the whole thing.
Don't just shoot at shapes and shadows.