This level of abuse is rare. The victim is black. It's possible that this was an example of racial profiling, or that he'd had previous contact with the police.

This level of abuse is rare. The victim is black. It's possible that this was an example of racial profiling, or that he'd had previous contact with the police. I don't know the whole situation. The U.S. is a large country, and local police departments are managed by themselves, so there's a lot of local and regional variation, but within the bounds you'd expect from "humans that self-selected for a position of power and authority". It's hard to make a categorical statement beyond "Beware those with power over you."