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.

I'm looking into a different actor's eyes every couple days, and I'm learning so much just to see the different processes people go through, and how their acting works for them.

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 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.

I think everybody came into it with the understanding that they would go through an experience that is literally not by the book, that is not executing the script and then going home, but living and breathing these characters and being in the moment with each other, and improvising and creating a lot of present-tense intensity between characters.

The first view is "bad apple." Bad apple is excusable. It's sort of like, something went bad with this man. But the second option is police corruption, so it's a problem with the department.

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.