I read somewhere that police are conditioned to shoot to kill because of this.

I read that martians control our politicians. It's just as false.

Simple fact: when shooting someone rushing you, it's easier to hit the big part of the person, ie the torso. Our police - not American , so YMMV - draw their weapon when it's the only option left - ie they can't safely flee - and at that point they all understand someone's going to be greviously injured in the next 4 seconds and they're choosing not-them vs them. It's like choosing Trump or not-Trump at that point.

This has a high probability of killing a person, but the main goal is they stop being a threat by lying down and being an injured person. It's just.that.simplified . Comically, the po-po is usually the one to render aid, as they're usually trained to do so and they're of course the first person on the scene, and the survival of the injured person is vastly improved from None to Slim by having the cop begin first aid .. for the mortal injury .. the cop causes.

Look: Our cops have deadly weapons to use when the situation becomes deadly. A sidearm is the compromise between "batons and harsh words" and "c7". From there it's this silly tree of if-thens that result in a cop trying to stop someone from dying of a wound they caused -- but there is absolutely no doctrine that says "kill 'em so they can't sue".

...at least, not in my region.