Stop murdering or otherwise harassing black people...?
Stop switching cameras off, stop blocking any attempt at creating accountability, stop working for the police.
Quick question. How many black people did US police murder last year? Order of magnitude. How many would be few enough for you to say that the police have "stopped" - 100? 10? 1? 0?
My guess is that the actual number is a lot lower than you're thinking, even when counting unintentional things like "police officer made a mistake, shot innocent person" and "pig strangled someone a little too long". Not to say that that's excusable when it does occur, but...
The thing that goes after the but is called an "excuse".