Watching/knowing and doing nothing about it makes them complicit. On top of that, that is the prime thing that they swear to do! To protect those that can't help themselves, and what do they go and do? That's right, they don't out the bad cops that prey on the helpless.
And it will never change so long as people like you absolve the shameful individuals that stand by and do nothing as innocents are harmed.
Don't be silly; you made all that up. Some cops are aware of bad behavior and don't 'out' it. Some do. Like the rest of us. The rest are on the street doing good day after day. One doesn't 'cancel' the other in any way.
These cops are the true heroes. Unfortunately the reason we rarely hear about them is that there are incredibly few. Much more comfortable to stick with the herd, follow orders and take your check.
And it will never change so long as people like you absolve the shameful individuals that stand by and do nothing as innocents are harmed.