Oh... So, there's no chance for this verdict to be overturned on appeal? Pardon me, Omnipotent One...
I'm sure the same could be said of your IT prowess, yet you're still able to turn on a computer and play on teh InterWebz. In fact, I bet your medical skillz aren't too thimble-toppling either, yet I bet you can still assist with basic first aide and perform CPR. I never claimed to be a legal expert, but I am not comfortable with the outcome of this case, specifically from the perspective of an individual who may need to defend himself and/or others or protect property in a similar situation. That's it.
I highly doubt he will win his appeal. His conviction was, and his appeal will be based on what the law is. Not what we or the jury think the law SHOULD be.
The pharmacist defended himself from the initial threat, and shot the robber in the head from about 20 feet away. In a separate, premeditated act, he went and got a different, more lethal gun, and put 5 rounds into the robber who was still laying on the ground. The pharmacist probably would have been fine if he put a few rounds into the robber during the first act, i.e., neutralizing the threat. It becomes problematic when he turns his back, walks away, then comes back with a different gun. I'm not going to turn my back on some random dude who is trying to rob me if I shot him and think he is still a threat. I'm not going to step over him. I'm not going to get within reaching distance of him. If he's still that much of a threat, I'm going to get as far away as possible while still remaining in range enough to get a good shot off if he gets up. The first reaction of the average citizen is to stay away from the danger. This pharmacist didn't feel that way, because there was no danger after he shot the robber in the head. It was game over right then and there.
He wasn't a threat after being shot in the head. That's why the pharmacist felt comfortable stepping over him, turning his back on him, getting within reach of him, etc.