Suicide after ten years

I read a book once upon a time (at least fifteen years ago) which told the true story (or so it said) of a man who announced that he would kill himself at age 29. When he made the announcement he was 19 years old. Ten years later he in fact killed himself. Now I need a reference to this story. I've googled far and wide, but no luck. Any help here?

No idea, but i want to read it

Blast! This sure sounds familiar to me, but no title or writer comes to mind :blush:
I will let you know when it pops up in my head, but knowing my memory I really hope somebody else can help you!

Good luck