Do you expect anyone to be arrested for this? They may arrrest the poor soul they killed, but that is about as far as it will go.
In Los Angeles County, Steve Cooley prosecute his buddies for Murder??? Not a Chance. Absolute Tragedy.
A similar thing happened in Fl a couple of weeks ago. A deputy pulled over an intoxicated man. As the officer was getting out of his cruiser the man opened his car door and began shouting at the LEO. The man began to approach the LEO. The LEO said he saw something gleam and opened fire. There were no weapons found, the police believe it was probably the victims watch that caught the light. No charges were pressed on the LEO because it was determined to be a split second decision.
Moral of the story, if you are loaded stay the ... home.