@johnpowell‘s story reminds me of one of my own. Has nothing to do with actually answering this, but it remains that this happened much before this was an awareness, apparently. Except where I lived everyone knew that if you weren’t white, you’d get the shitty treatment if the cops busted your for shit. Mostly. Except in this case it was Indians, not blacks. Winnipeg, Manitoba, just look it up, srsly. (natives is the term they seem to prefer, by saying Indians I mean no disrespect)
Me and my Inuit friend ran across the street on a red light and got stopped by cops. Long story short, she was searched, then her info was looked up in the cruiser computer, and she had a knife on her, which was taken away.
I myself was left unmolested, not searched, my info was not taken, all that happened to me was one cop flashed his flashlight in my eyes to see if I was on drugs. We got let go after. Could have been much worse for my friend since she had that blade on her, but I guess shit got lazy.
This shit has always happened, but I guess technological advance makes it easier to track down. But eh I don’t really think this is something people didn’t know before. We’re prolly just singing an old song here.
Back in the 20’s there was no fuckin technology, yet everyone knew that blacks weren’t allowed to buy toilet paper or eat in restaurants.