Dear Kathy,
I'm so sorry and deeply touched by the story of your dear brother and the unfortunate end. You can't help but say, "if only"....but sadly, that was the decision he made so many years ago that unfortunately led to the tragic end.
There's a lesson to be learned here, especially to all you newbies that have been told that you need OHS in the near future. Have it done....don't wait or think that it will go away or get better on it's own. It won't.
Godspeed and my deepest condolences to you, Kathy and the rest of your family.