tl;dr - Black man driving his dad’s BMW is detained for being suspicious because he doesn’t look like the sort of person who drives that car. He is subject to a rough arrest as his mother watches. Gatineau police insist there was no racial profiling.
If they do it once, the armor is cracked. If the armor is cracked, their whole organization, and the prison conveyor belt all fall apart.
If that later falls apart, then the citizenry will notice the injustice of the next tier more fully, and the cycle continues. Cops are bastards because they more than anyone else prop up injustice because they insulate it.