In other words, they need to do their jobs without breaking the law. These cops may still be in the minority but they dominate their departments. Consequently, I have little respect for law enforcement. But, in all fairness, it is not only law enforcement that allows brutality to continue. The mainstream media looks the other way.
District attorneys look the other way.
The courts rarely intervene. The elected officials do nothing. In other words, we have a system that by doing nothing ends up sanctioning brutality. This is what people mean when they say police brutality is a systemic problem. One important way to bring an end to this violence is for cops who witness brutality to come forward and expose it.