But the reality is that the police serve a certain function, to maintain a certain status quo, and that's one of the things that the movie is about, because it basically gives you three options for looking at the police, as symbolized by Dave Brown.

I think that almost every scene was an exploration - it was never going to be just what’s on the page. So I know I was very lucky - we all were - to work with a cast of this caliber. These are extremely experienced and intelligent actors, who are also deeply emotional and - as you say - are also engaged in the world.

That's really the big inspiration of this movie. It's really looking at a man who's really showing all the traits and all the characteristics of the classic patriarchal country, where he's of military power, he's the king of the hill at home, as well as in the streets. He has the liberty to live where he wants.

I mean, you always hope to have a part on every level, on every layer. For us it was very much a conversation about power and sexuality and brutality. And really all the issues that are in that world, in that space, come down to one word, which is "masculinity.

If you look at it that way, then you start thinking about the basic things, which are jobs not jails, and education not incarceration.

I think that's an incredibly overwhelming reality that is really at the basis of how we're going to deal with this. Looking at the film, people will say, "Oh yeah, you're criticizing the police." I say, "No."

So the only problem that you have is actually switch things in the department, changing things, controlling things, putting it maybe under federal supervision, and if you fix the department, you'll fix the problems - with police corruption, with brutality, with evidence tampering, all those things.