You only get three kinds of black cops though
The I'm here to protect niggers FROM cops, not enforce laws. These ones end up on the force and are crooked as shit, and basically wont enforce laws on blacks at all. For the females, they tend to go into prison guard jobs instead of join the police, and end up smuggling in shit for niggers, and literally fucking them in their cells when they can get away with it. Niggers will find out where these cops live and make sure they know where they are so they can avoid getting in trouble while breaking the law
The "nigger" cop, who is violent, unruly, will do shit like hurt suspects when they can. They use the police badge as a way to get around being able to get in trouble for their actions. Theyre the ones who think up the shit like the "rough ride" back in baltimore, granted the nigger in custody was flinging himself around to hurt himself to, but the nigger cop was always trying to hurt him. Niggers hate these guys along with all the rest.
Finally, the "uncle tom" who is basically a white man in attitude when it comes to his job. Niggers them the absolute most, because they expect them to be on the niggers side, but they arent, so they get even more irritated with them and act out even faster.
So yeah, the whole "let black cops do it" would only be worse in the end. You'd either have nigger cops beating nigger suspects constantly, and whitey would still get the blame, or nigger cops running cover for perps, OR you'd have "uncle tom" cops getting shot to hell instantly for not towing the line for the niggers, which would only result in fewer of them signing up or being willing to work those areas, which just leaves the worst of the worst nigger cops to go to those places or join the force for those jobs.
Essentially you turn black communities into fucking full on african warlord territories that way. Which granted, I'm not against, as long as they stay there. Let them murder and rape each other all they want, just leave white people out of it (they can take the occasional wigger bitch or latina whore for their pleasure, consider it a peace offering, those kinds are of no value to us anyway). But they wont do that, they spread, like an unchecked infection. Its what they do.