How much more money do we have to waste, how many more families have to be destroyed, how many more people have to be killed before you summon the courage to tell the truth to the American people?

American cops are the ones who are in the emergency rooms. They're the ones who go to the morgues. They're the ones who have to go tell the families that their son is not coming back, their husband, their wife, is not coming home that night. So when we talk about guns and gun violence and police, let's understand that as well. No one wants guns off the streets more than cops because cops are killed by those guns.

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.

I try to pay attention to language. I think that as a general rule, we as writers talk too much and we should listen more. I read my dialogue out loud to myself because I think that's when you catch the wrong notes and the wrong tones.

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 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.

I have sat with the mothers who have lost addicted sons. I have sat with families of kids who have been killed in drug-related gang violence. I have been to the prisons. I have seen the effects. At some point in time, I felt I had to do something other than write a novel about it, that I needed to try to make some sort of contribution, at least try to make some sort of difference in the real world.