Sad story, and it may well be his addiction in his teens led him to this, but the evidence points to a number of other factors, the most recent being the use of a dangerous but legally prescribed drug. Many journalists do not have the courage or brains to take on the large pharmaceutical industry, so they blame it all on cannabis.
Funny, I did not find a single story about how alcohol kills, or a call to reclassify alcohol. Or monitor drug companies. Or implement regulation in the press.