Because you aren't allowed to kill unarmed people.I'm not familiar with this case but IF it was an honest mistake then why was he convicted of MURDER; makes no sense unless there's more to it.
"“I feel my actions were justified,” Coy said. “I reacted the same way I had in hundreds of training scenarios. I drew and fired my weapon to stop a threat, protect myself and my partner.""
Appealing.
Greg
Simple.