Ersland was a psycho Water Mitty that executed an unconscious young robber that never had a gun and was laying on his back, if you watch the video, Ersland was casually walking by and turning his back to him while he went and fetched the other pistol to empty into the unconscious figure.
I have no problem with “speedy” Parker being dead. He chose to trade his life for whatever cash was in that pharmacy that day. The accomplices face murder charges as well. If Earsland is now responsible for his murder, how can they be? Logic would say because they were engaged in a crime when it happened. This verdict means he died from a separate crime. It detaches from logic to say he died as a result of anything other than consequences of actions he set in motion by going in to rob the place.