To be honest our police, specially the one from Rio is ALWAYS looking for an excuse to act like complete bloodthirsty animals.

"Hello black teen from the favela. *Shoots him in the chest*. Oh, was that an umbrella instead of an assault rifle? Oh my, sadge, let's file this under the isolated incident number 3481"

The same is for the constant violence towards argentinian fans. They know that tensions exists between brazillians and argentines, the moment a fight occurs they have the green light to go wild. After the fact those acts can be justified due to racists remarks from the argentines and they get to dodge the blame much more easily.