[Grando Calrissian]

Yes, and (independent of adrenaline) one shot center mass should always be enough. Of course there really isn't a lot of difference getting shot once center mass and getting shot 10 times center mass. You usually end up dead in both instances.

This is why we need to remove the endocrine gland from all cops.

[discostu]

Not at all. Unless you're putting a 12 gauge round into the person's chest he'll still be able to shoot you for at least 10 seconds (even a 12 gauge round is no garauntee of instant incapacitation, people aren't easy to make stop twitching). It's all about rendering the person incapable of shooting back right now, dead or alive doesn't matter, there are two questions to ask after shooting someone: can he still shoot me? is he still trying? If the answer to both of those appears to be yes then you shoot them again. Even in the stills you can see the guy is continuing to stumble around and attempting to point his "gun" at the officers, the answer to both appeared to be yes, shoot him again.