No. Police aren't Annie Oakley. Chances are, they wounded the suspect while trying to kill.

In a life or death situation (which is the only time it is acceptable to shoot a person), nobody has time to make trick shots. If the target deserves to die, aim center mass. If not, don't shoot at all.

Imagine if the cops tried to "shoot to non-fatally disable" someone who didn't deserve to die, but killed him anyway? That would be murder. You don't shoot at anyone if killing them isn't justified.

Then if you miss and shoot the gun out of their hand, or whatever the movies have told you is the easy, humane thing to do, well, that's a bonus. You can breathe easy knowing you didn't end up killing anyone.