I've read that in my old home town - Chicago - cops have to fill out a 3 page "contact report" justifying why they talked to someone on the street. And of course, race must be noted.
In Austin, TX, a couple of years ago they had a story about "de-policing" - a practice in which traffic cops simply stop issuing tickets to certain minority drivers because they get in trouble if minorities are disproportionately represented in their ticket books. Being assigned a beat in a minority area is no excuse. (I saw this story ONCE on TV and there was never a follow up.) And of course, now local Austin cops have to be "hands off" the bums since camping and such has been legalized in the city . . . except around City Hall.
Then at the other extreme, we have "no knock" raids, planted evidence, and increasing militarism. Seems the reasonable middle ground of traditional "peace officers" is being lost to "law enforcement."