I think that most of us instinctively avoid people with mental illness.
If I weren't making documentary films, I suppose I'd be teaching.
If the subject is no longer living, the immediate question is do you have enough first-person material to really get that story across. You'd like to avoid it just being other people's memories and interpretations.
We don't see many films in which someone with schizophrenia is the main character.
I've been very lucky in my life to have some great teachers.
You can just imagine the restrictions of shooting in a prison, but I just decided I'm going to embrace those restrictions sometimes when you don't have many choices you can make the best choices.