I beg to differ
Explain it to me
OK, against my better judgement, I'll indulge you. First, I say this as someone that has been professionally trained to shoot people at distance with a long gun and up close with various CQB weapons. I'm not some Fudd with a subscription to Soldier of Fortune, or some gun bunny magazine. Go look at a drawing of the veins and arteries in the pelvic and leg region. Let's put aside the idiocy of someone thinking that a normal person (badge aside, that's exactly what LEO are) under extreme stress is going to make what is essentially a called shot. A bullet through either of those locations is just as apt to hit a point of major blood supply. You can bleed out just as fast if shot in the leg as you will in the chest. That's not me pooh-poohing what I think is an extremely uninformed and stupid idea. That's just stating plain fact.
I'll add this, too. Look at the definition of "deadly force". No where will you find the word incapacitate. If you not are going to point your weapon at someone and pull the trigger without the knowledge or intent of killing them, then you shouldn't be pointing your weapon at them and pulling the trigger. Legally and morally it's wrong to do so.