That's not true. The perp wasn't in view after the inital shot, and there is no way to tell if the perp was able to regain his composure, pull out a gun, and kill the pharmacist.
The pharmacist’s actions were in full-view.
His actions were not of a man who thought he was in danger.
If he thought he was in danger, he wouldn’t have moved so casually and kept hus back to the perp and he certainly wouldn’t have stood over him to shoot point blank.
Wrong, if you can't tell that from watching the druggist himself, then know that when the robber collapsed unconscious from a brain wound, lay in his own blood and blood splatter on his back with his hands out, never moving, and never moved even when he was being shot five times, the coroner and forensics easily could read what happened to the unconscious body.