The reason why cops get a special deal is very simple. Politicians (and most of the media) are completely intimidated by the Police and the powers that they wield. They are afraid if they go against the police the police will retaliate against them one way or another.
The last Police Board Chair to stand up to the cops was Susan Eng. In retaliation - Julian Fantino ordered wiretaps of Engs phone and private investigations into Eng's associates in an attempt to dig up dirt on her.
I have no doubt that Fantino's protege' Bill Blair learned well the art of intimidation - what other explanation can there be for Blair keeping his job after publicly going against the Mayor (over the budget) and his screw-ups during the G20 that have not only cost the city $Millions but have resulted in most of the public losing trust in the police.
We are living in a police state. The police are out of control and can literally get away with murder