The Wire, Season 3

Colvin:
This drug thing, this ain't police work. I mean, I can send any fool with a badge and a gun to a corner to jack a crew and grab vials. But policing? I mean you call something a war, and pretty soon everyone is going to be running around acting like warriors. They gonna be running around on a damn crusade, storming corners, racking up body counts. And when you at war, you need a fucking enemy. And pretty soon, damn near everybody on every corner is your fucking enemy. And soon, the neighborhood you're supposed to be policing, that's just occupied territory. You follow this?

Carver:
Think so.

Colvin:
Okay The point I'm making is this: Soldiering and policing, they ain't the same thing. And before we went and took the wrong turn and start up with these war games, the cop walked a beat, and he learned that post. And if there were things that happened on that post, where there be a rape, a robbery, or a shooting, he had people out there helping him, feeding him information. But every time I came to you, my DEU sergeant, for information, to find out what's going on out on them streets... all that came back was some bullshit. You had your stats, your arrests, your seizures, but don't none of that amount to shit when it comes to protecting the neighborhood, now do it? [sighs] You know, he worst thing about this, so-called drug war, to my mind...it just, it ruined this job.