I am very glad that a number of you do not write the laws and thankful that jury instructions are available for criminal trials.
There is some horrificly bad legal analysis in this thread and some very weak moral rationalizations as well.
First of all, someone said that they didn't enter the store with the intent to kill. Ever heard of felony murder? If not, read up.
Next, in every state that I am aware of, lethal force is only available to meet the same. Once you are no longer in jeapordy and you use lethal force, your are criminally liable for your actions. Also, lethal force /= any force (lesser force is so much easier to justify). And finally, in many states you have a duty to retreat if at all possible. This guy used lethal force on an unarmed kid, which probably would have been fine because his accomplice was armed, but the kid ceased being a threat the minute he went down. And, the armed kid ran, thereby REMOVING ALL THREATS OF LETHAL FORCE. Then the pharmacist went for a vengence kill. It's that simple.
I suspect that the pharmacist's lawyer argued that his actions were a continuation of the heat of the moment but lost because the threat had abated and 5 damn shots with another gun. If he had spazzed out and immediately pumped 6 rounds into the Parker kid, without stopping, he probably could have pled it down to 2nd degree. Manslaughter does not apply here. He used lethal force with specifc intent.
And from a moral standpoint, that is some cold blooded shit. I have quite a temper myself when my family/friends are threatened, but landing a likely lethal shot on another man and then having even a few seconds to think about it would probably floor me. It doesnt matter how depraved the indivdual is (and this was a dumb kid)... a decent person's anger would be overcome by the horror of what happened and the desire to see to everyone else's safety. A decent person would have called the cops, even if he felt the need to keep a gun trained on a young kid who was bleeding out on the floor from a probably fatal head shot.
Finally, it is good that the two guys who put the kids up to this were convicted as well. The mom calling her son a hero is a bit much. Being a hero would have been standing up to the two dickwads who put him up to it. If he had died or been hurt resisting their compulsion, "hero" would have been justified.
There is way too much bloodlust on this thread. I suspect it is from a bunch of people who have never seen death or much violence either. It is a horrible, horrible thing. Only the most depraved are not scarred by it. To so gleefully and enthusiastically applaud the pharmacist in this situation is disturbing, to say the least. I think most of it is internet bravado and some repressed anger.