Billy Beck asks it.
The Village Voice gives the background.
I'll answer the question with a story from my days as a baby Assistant District Attorney.
One day, while talking to an NYPD anti-crime (i.e., a special unit used against taxi robberies, armed assaults, and other high-intensity problems) cop whose arrests I had prosecuted previously, I mentioned something about "the good guys".
The cop shook his head, looked at me with pity, and said in substance:
Pete, remember two things if you remember anything of what I tell you. First, the NYPD is the largest gang in America. Never forget that. And secondly, just remember that we are, in the final analysis, private security for special interests. Keep those things in mind and you'll be a lot better able to see reality.
I did, and I was.
You remember those things, too.
And be careful out there.