Cops are trained to shoot center mass, they don’t “knee cap” people.
I was responding to the poster who said he should have fired so as not to hit vital organs. Even if they don’t try to hit center mass, I imagine adrenalin would make every shooter a little wobbly.
It could also be why 10 cops empty their clips on one person. That happens a lot, too. The other reason is they’re like a pack of dogs. One barks and they all start barking.