Or (4) they do believe the research, and they use it in their calculation that says that while they should err on the side of caution and should overdo force "a little bit" just in case, that they should be careful not go too far...
... which turns out to be the same calculation they used all along.
but they have cool toys and can pretend they are actual badasses when they raid your home and shoot your dog.. .even tho many of them cant qualify to get in the military ( too fat )
(1) The law enforcement decision makers are unaware of the research (which is unlikely), or
(2) The stated motivation is not the actual motivation.