From this post I'm sure you have not seen the video. Watch it and then get back to us. The dead guy did not have a gun, the incident was over and he was no longer in the process of trying to rob the place and he was most definitely no longer a threat. The pharmacist walked over to him after everything was over and executed him while he was lying on the floor.
I watched the video before i made my post!!!! AND???? We don't know what was going out of camera view. So if he would have died without the the owner shooting him again that would have bee ok???