We lie to ourselves and try to escape that bitter reality by saying that the world is divided into good guys and bad guys, and that we're the good guys. We condemn people as evil to reassure us that we're not like them. If there's to be any hope of preventing these things from happening again, we have to look at the reality. That any act of evil in our history was committed by human beings like us. That, very often, we're all implicated in it.

Direct cinema is about simulating a reality in which you're not having the overwhelming influence that you really are having.

We lie to ourselves and try to escape that bitter reality by saying that the world is divided into good guys and bad guys, and that we're the good guys. We condemn people as evil to reassure us that we're not like them. If there's to be any hope of preventing these things from happening again, we have to look at the reality. That any act of evil in our history was committed by human beings like us. That, very often, we're all implicated in it.

I think we need to make documentaries about fantasy and storytelling. I think I just started to scratch the surface of a method that allows us to do that. We want to be sucked into the events, suspend our disbelief and imagine that this is a fiction, but actually putting onscreen the gap between who the people are and who they want to be and therefore opening the question about why they want to be this person.

Performance is always oriented towards a spectator, towards an imagined audience and I was thinking who is their imagined audience?

Each and every perpetrator was boastful, usually they would invite me to the places where they killed and I would of course accept those invitations because I could document what happened that way.

I believe every time you film anybody, you create reality with that person - whether it's fiction or nonfiction. If you acknowledge that filming is an occasion where people express things they might not otherwise express, that offers a much more insightful analysis of why documentaries - even of the fly-on-the-wall variety - are powerful. I think that our task as filmmakers is to create the most insightful reality given the most pressing questions.