Poor Robin, it is being said that he had been told he had parkinsons. With his own demons before you take
into account one of the first signs of parkinsons is depression. So he might have thought it best to go on his
own terms rather than get to a point where he would be a burden to his family and friends.
http://www.bbc.co.uk/news/world-us-canada-28796277
I had seen my granddad suffer of parkinsons among other things towards the end of his life and took it's toll
on the whole family. I would not wish parkinsons on anyone!