I did not realize that this was already under discussion (and can't find the other discussion). My apologies to the moderators. Unify or close this one as you see fit.
In response to MLeake's post: Yes, part of my point is that there is no such thing as non-lethal use of lethal force. You have at least some chance of bleeding out from any gunshot wound, and a better than fair chance if the femoral artery is hit.
No fault at all to the clerk for shooting. I would not have watched someone walk away with my kids when they were little, either. I did not pick up on an indication that the BG picked up the stroller, and assumed it was still on the ground. If the kid is in someone's arms, i.e. up around the chest, shooting for the legs may be your best choice.
I'm for what works.