Wow, I'd love to see some of his work!
I know he was a psychopathic wierdo, probably devoid of anything approximating normal emotions. Psychopaths do not feel fear, one of the most important emotions in terms of survival - they also have to imagine what other emotions are like - from watching people. They mostly try to act as if they feel things.
I'm very interested in what he produced, visually, on paper. (or some other surface)
(just had a wee google - interesting stuff!)