Would you or anyone else know what his exact mental illness is? What I mean to say has it been diagnosed or is the behavior the descriptor? If someone acts crazy or mentally ill, it could just be an abnormal chemical reaction in the body. After a diagnosis has been made, medication can be tried and altered if need be. I deal with these types of people from time to time who act crazy, get the diagnosed and is fed meds and then are perfectly normal again. Of course they commited a crime which brought them to prison which got them the help but there are other ways I'm sure even in Brazil.
I never knew the man but I respected his skills when I first started and still do. Terrible, terrible thing to happen.
