"...you really can't blame the public for starting to believe that they're all crooked."

Reason Magazine - Hit & Run > City of Bruised Shoulders:

"So remember the video of the off-duty Chicago SWAT officer beating the mother-grabbin' vocabulary out of a female bartender a third his size?

A second video surfaced last week, this time involving six other off-duty Chicago cops slamming some heads in a bar brawl.

...That was in December. Police officials saw the video of the fight five days after it happened. Yet the brawling cops kept their jobs, positions, and patrols until late last week, when the bartender beatdown video got the media sniffing, leading to the discovery of the video of the December brawl. Four months later, only after another one of his men was caught on tape beating a civilian, Chicago Police Superintendent Philip Cline decided to suspend the six officers involved in the December brawl, noting that he probably "mishandled" their discipline.

"Mishandled" is one way of putting it. "Covered up" is probably more accurate.

...I'll include the obligatory "only a small percentage of cops are bad" disclaimer here. But when the entire department—right up to the chief of police—continues to cover up for the bad seeds, you really can't blame the public for starting to believe that they're all crooked."