Dolfin,
I'm sorry to hear this, and I know how hard this all is for everyone that knew him. I'm not going to go into "Roe's real life files" but I really do know what you may be feeling.
((((((((((( Dolfin ))))))))))))

It is not uncommon for us bipolars to feel so "up" and all, while in the recesses of our mind we are thinking in a entirely different place. There are several reasons and then some will never know the reason. Based on a personal situation, after suicidal ideations consume one,embracing the thought of death takes over, it can even appear that this person is at peace, almost one can say seems happy.
But the happiness isn't "happiness" as known, it is "depression", that wicked monster is rejoicing over it's catch for the day.
I'm not saying this is what has happened with your friend, but is one of the many things that can occur, especially if a person decides to stop taking their meds., that happens often, especially when someone is near or in a manic episode, you get to feeling so good, a person feels, "what the heck do I need these for"? I have seen in my household as a kid, what happens then. . .total disaster.
Enough of my ramblings.
This is so very sad, and I am sure for those who knew him and even maybe just met him, are both devastated.
Like DJ said, I hope he found peace.
I hope and pray, none of us will ever find peace in that manner. I almost did, about 5yrs ago., another long story.
Please take care and know we are here if you wish to talk, or just hang out.

Rosanne