That 95% is not going to be harmed by more training. The fact is that there is a tremendous systematic problem with U.S. police in terms of what police do and what they get away with.
And you know this because you have been on the streets as police officer correct? If not, I can only assume you gather this insight after watching a few you tube videos and news reports that leave facts out or slant coverage to drive a certain narrative (Baltimore, Ferguson).
Most policemen are fine people. There is one living right behind my house, too.
However, there is a few rotten apples, thinking they are allowed to do anything. Given how you defend them, I can only assume you are one of them.
Given your reactions on various threads, it's also clear you have no self-control and are the kind of cop that's more than detrimental than helpful to the community they serve.