Another Militarized mongoloid cop who was rewarded for his abuse. Sadly, that's the norm nowadays.
It is but one provocation for the spreading resentment of police we are seeing today. This stupidly brutal punk is only one cop but that fact does not register in the public mind. What people see is a uniform and that image imprints in the subconscious. Enough images of this kind and the word "cop" becomes synonymous with
brutality.
Good cops, i.e., cops who are sufficiently rational and intelligent to be critical of this kind of behavior are constrained from doing anything about it by fear of being labeled a "rat," or by risking their own calls for assistance being ignored in a life-threatening situation. (E.g., the movie,
Serpico.)
So the problem plainly rests with improper and/or incompetent training and supervision. A brutal cop is promoted or becomes a training officer and what comes of that is predictable -- winking approval of improper conduct by his/her brutal subordinates.
Moreover, good cops are influenced by the improper behavior of the bad ones. A kind of
machismo becomes associated with unnecessary use of force. Unnecessarily forceful conduct becomes analogous to winning moves in a football game. Doing the job becomes a kind of game -- a sport.