To be honest, it's a bit more complex, and as with all substance abuse, there are underlying causes. But the short story is he developed schizophrenia. We're n

To be honest, it's a bit more complex, and as with all substance abuse, there are underlying causes. But the short story is he developed schizophrenia. We're not sure if cannabis was a cause or a trigger or what, but he was a heavy smoker, and he had a history of theft, etc. linked to cannabis (much as he would have if he abused alcohol or other substances. But the schizophrenia angle was stressed by the mental health professionals that took care of him). http://www.nhs.uk/news/2014/06June/Pages/Cannabis-use-genetically-linked-to-schizophrenia.aspx http://www.nhs.uk/news/2014/06June/Pages/Cannabis-use-geneti... http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4033190/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4033190/