The police officer has given multiple stories and been caught doing it.  He shot the guy with no reason to do so.  Sounds like murder to me.
Also I would have you know that I'm not an anarchist.  I know how important having a well trained, well funded, and well educated police force is to society.
What you should know is that I also have zero tolerance for anyone "accidentally" shooting someone.  Guns don't kill people, people kill people, right?