Somewhat expected I fear. The whole episode had really destroyed not only his personal life, but his career too.
I think it would have been quite possible for his career to recover, he had managed the whole affair with real humility and dignity from what we saw through the media. However this had clearly had a tremendous personal impact on him, and he must have felt that life was no longer worth living.
As Charlie says, a timely reminder, of any kinds of substances which impair judgement. Many of us would consider driving having had 'just the one' but don't lets kid ourselves that we don't put the lives of our nearest and dearest at risk. Not to mention other road users.
Mark once did a section where he painted an eagle on the nose of an F3, then followed it in flight in a Hawk. Much happier times,
Steve