I would suggest that your brother is getting a taste of what black people go through every day.
Black people do NOT go through this everyday. Their biggest problem blacks have in this country is themselves and their decayed subculture
I've seen it happen with my own eyes.
It's happened to me and I'm not black.
I worked music concerts and other events for 35 years. I've seen it at work and not at work. I've experienced it at work and not at work.
I have friends who are black and they have experienced it. I've been with them a couple times when it happened to them.
There is a problem with some police in America. Not all but enough to make the rest have to deal with the consequences of the behavior of the bad ones.
I can tell you, I can't stand telling a cop something and not being believed. Being forced to prove what I say to a cop shouldn't happen like that. They should believe something when they're told by that person that they are also working and supposed to be where they are. Or anything else. I got sick of it and just started carrying paperwork to prove who I am and why I am there. It gets old after a while. Especially when I'm well known at the places I worked.
Just because you may not see it or experience it or because your brother and those he works with doesn't do it or you don't see them do it, doesn't mean it doesn't happen. It does. More often than you think.