Do the police have to shoot to kill? Is it possible to aim somewhere else? Or shoot into the air? Also, I think in my country they are obligated to shout out "stop, I will shoot" or something to that effect.
Here (Sweden) officers somewhat controversially use hollow point in order to reduce the risk of stray bullets going through walls or suspects.
This has the side effect that suspects shot in thighs, nearly anywhere in the abdomen etc are often instantly in critical condition.