An unfortunate event to say the least. Obviously the police officers did not intend on shooting innocent bystanders. Remember now, that happened in downtown New York. LOTS of people around makes that a bad situation.
As far as the mental marksmanship topic stated earlier, it's a bit hard to replicate situations like that considering the stress level will never be the same as the real deal would be. I do agree with the muscle memory training though. Wish I could get to that level myself but can't afford that much ammo.
"Vegetarian, an old Indian word for bad hunter."