>you are far more likely to shot or beaten up by a black man than you are through a crooked cop

True, but after being shot or beaten up by a black man, you are free to go.

If you are shot or beaten up by the cops, you will be arrested and charged with a felony. And then you will have to prove your innocence.

See, for example, https://en.wikipedia.org/wiki/Rampart_scandal