[PapaBear3625]

4) If you need to shoot once, you probably need to shoot more than once. Do not pause to “damage assess”. In the immortal words of Tuco, “When you have to shoot, shoot. Don’t talk.”

Police are generally trained to keep firing until the bad guy goes down. That is prudent for civilians as well. If he's standing with a weapon, keep firing. If he's down and still has a gun in his hand, keep firing (he can shoot you dead while laying down just as easy as standing up).

[21twelve]

And if he doesn’t still have the gun in his hand, he still did.