Last month, a Las Vegas cop named Derek Colling was at the scene of a burglary and saw a guy taking video from across the street, which is completely legal. But when Colling told him to turn the camera off and the guy refused, Colling beat him, cuffed him, kicked his camera, and arrested him for obstructing a police officer.
In fact, he was standing in his front yard when it happened. All charges against him have been dropped, and the cop has been suspended while police investigate.
Warning: Language NSFW.