Massacre in Rio de Janeiro

What a terrible thing it is when the police are the criminals; from the Reuters report :

Brazilian authorities have arrested 11 police officers over the killing of 30 people in a shooting rampage on the outskirts of Rio de Janeiro, the state security chief said on Monday.

The Thursday night slaughter, which is suspected of being a response to a crackdown on corrupt police officers, was the worst massacre in more than a decade in the violent seaside city.