Cops carry mace.
Mace must be very similar to what bicycle riders carry to deal with aggressive dogs.
Any cop that shoots without first trying mace should be fired on the spot.
As far as that goes, the stuff sold in bike stores for dog protection is in a can about twice the size of your thumb. There is no reason cops could not buy it on their own if they are that afraid.
The truth is they are not that afraid. They just want to shoot something.