I read the book a few years ago, and while I enjoyed it, I felt that the relationship between the main character and his parents wasn't adequately fleshed out. I, too, saw the Charlie Rose interview, and the impression I got was that Penn consulted with the parents and may in fact be illuminating the story rather than embellishing it. I don't need a black and white answer to explain why that tragedy happened, but would like to understand the family dynamics more. Regardless, I'm looking forward to seeing what Penn does with the story. He seems to have put a lot of care into telling it.