I heard many years ago that a young man about my age who I had vaguely known as a teenager had shot himself. This was long after I had moved away, but I did remember him. His dad had been my optometrist since I was a child in grade school. The dad was also an elder, though not in my congregation. I don't know much more about it, but have heard it was related to alcohol and drugs. An affluent and supportive family doesn't mean a person won't have internal conflicts, and some folks are just overwhelmed by them. So sad...
The only other case I recall involved a very likable and meek man who had been a "Servant," a term preceding the elder arrangement, since the 50's or 60's. He had gone to the same high school as Elvis, though he was a year or two behind him. He claimed to have known Elvis then but was not a close associate. I've seen his high school yearbook and it confirms his claims.
Anyway, he seemed like a model Witness, though a bit timid and reserved and something of a hypochondriac. I was shocked when I was told he had died, and flabbergasted when I found out he had committed suicide. He had told his wife he didn't feel like going to the meeting that night, so she and a friend went on without him. When the wife returned home, she found him dead in his car in the garage with the motor running. He left a brief note apologizing ("Sorry this happened. I love you all"). An elder gave a memorial talk at a funeral home, and mentioned several times that suicide was not the "unforgivable sin," and that we shouldn't draw any conclusions because no one could know all the circumstances or what was going on in his head. Ok, fair enough.
Fast forward about 10 years... I hear from a very reliable source that what actually happened was that his wife had caught him in the act of molesting his young granddaughter and was going to turn him in to the police the next morning. She had given him that evening to prepare himself and get his affairs in order. Since he was already dead, she never reported it to the elders or the police. But she confided in some of her closest friends, and that's how I got the story, albeit with one degree of separation. Very few know even this much about what happened. And I doubt anyone but the wife knows the whole story, even now. Again, a very sad tale.