Having lost a friend to mental illness last year, it has opened my eyes to mental health. My friend left work early one day, his colleagues felt he was just having an off day. Within 15 minutes the guy was dead, just 2 text messages and one letter left.
No one knew of his illness and none of us suspected that he may take his own life.
This could have happened on any sector that day, the only saving grace is that the skipper left the FD at TOC and not just before TOD. There could have been far worse consequences had the aircraft crashed into an urban area.