Hmmm. This individual held an ATP, so theoretically was getting approval from an AME for a Class 1 medical certification. Yet somehow, it’s this kind of incident that is often used as evidence to justify the need for government-mandated flight physicals.
That aside, we bemoan the lack of judgement exhibited by someone wasted on drugs that, in part, destroy one’s ability to exercise judgement. But what about everyone else? What I find very difficult to believe is that any of the many people–including the passenger–who must have interacted with this person before he got in the aircraft failed to notice anything out of whack.