American cops didn't create that atmosphere, they're the ones though who have to live with it on a daily basis. These are generalisations; you can't make generalisations about hundreds of thousands of people. The New York Police Department, for instance, has 38,000 police officers in it. But most cops, when I talk to them, desperately care about the victims of gun violence. They see it, they experience it.

It's important to me that the reader goes on a ride with the characters, that you set context enough to know, "Okay, here's where we are in the world. Now we're just going to go inside this person's head, this guy's heart, this woman's ambitions and take it down to very, very small scale."

I think one of the problems with being a fiction writer these days is that you can't keep up with the headlines. Things that people would say are absurd occur the next day or they come out of somebody's mouth. There are days I just wanna give up.

Shane Salerno and I adapted my book Savages together, and I learned a lot about adaptation. I think it's an extremely difficult thing to do; adaptation might even be more difficult than writing an original screenplay. It's so much a matter of choices, making choices of what to leave in. It was an education.

I was researching some of the modern-day figures that The Sopranos were moulded on. So many iconic Sopranos moments. James Gandolfini and Edie Falco had an incredible scene together in the kitchen of that house that looked like it was about to explode. That was an iconic series that changed the way we did television. It is also an extremely realistic portrayal of the mafia. Much more so than The Godfather. The Godfather, one of the greatest films ever, but let's face it, a romanticized version of the mob.

Ridley Scott obviously an iconic director, he's made some fantastic films. Obviously a very smart, very tasteful, thoughtful guy. So yeah, I'm in good shape; got Ridley Scott with The Cartel.

I'm a jazz guy and a Bruce Springsteen guy. So I wanted something more current, and edgier, and angrier. So I asked my kid to educate me about hip hop; he has an encyclopedic knowledge of it. And he did so. I found it to be much richer than I would've thought. I think some of the poetry in it is really spectacular. I threw rap into the book. I think I mentioned Kendrick Lamar. I'm really into Tupac these days. I love Nas, N.W.A.