Extreme stress makes people do strange and sometimes terrible things.
In the years 1980 to 1988 I knew five people who killed themselves, four of them were friends, one of them a very close friend.
Without exception it was a great shock to all around them that they took the action that they did. I cannot understand why they did what they did. But they all have my deepest sympathy, and if there had been anything I could have done to help, I would have.