The only exception I can think of is the sergeant who heads the SWAT team....still going after 35+ years: an Army reserve Master Sergeant who was wounded in Vietnam, stalked the desert in the 1991 Iraq war, and cleaned the streets of Fallujah in the first year of the current war....busting into houses full of bad guys and spraying lead. My hero. A guy like him would absolutely kick ass. But he would eat light bulbs and castrate himself before he worked for the indecisive, perfumed commanders in the UN. A bunch of peace keepers like that...and they might actually solve something. Can't have that! [Anything I ever learned on the job that was worthwhile , I learned from him.] Old-timers who retired without rank are usually no-nonsense, practical thinkers. They would never do for the UN's purposes. They are un-trainable. :^)
A good portion of the NYPD comes out of John Jay. I was up there not long ago and those kids looked sharp. Not like alot of the kids you see going to say, NYU or Columbia looking like they just rolled out of bed.
As much as I hate to admit it, the PC thing has its place in police work, but in NYC — not so much.