I have no doubt that a lot of people falsely claim police brutality - but there are PLENTY of cops who resort to UNNECESSARY violence at the SLIGHTEST provocation even when they KNOW they're being recorded.
That kind of arrogance is incredible; imagine a thief who walks up to a surveillance camera, holds up his loot, give his name & address and says "come get me, bitches".
One recent incident involved a kid on a motorbike who rolled through a stop sign and then tried to evade a cop in a cruiser. The officer shot at the kid several times, hitting him at least once in the leg, forcing him to pull over and you can see him raise his hand, turn off the bike and begin to dismount.
Before he's halfway, Officer Wannabe Texas Ranger comes running at him and executes a flying side kick that knocks both kid & motorbike ass over teakettle??