Originally Posted by J. Falcon

The entire focus is NOT on brutality, as that would make for an altogether different type of program.

But police corruption and brutality often go hand in hand. That said, the show does deal directly with brutality, especially the Freddy Gray murder by Baltimore police, and civil rights activists in that city. However, I'd say the "focus" of the show is on the fucked system of law enforcement in the US. Sort of like The Wire, in a way.