That is an idiotic thing to say, and it only raises doubt about all of your other statements.
Aaron was chronically depressed for years. People who are chronically depressed tend to kill themselves, or at least try to. Their external circumstances are rarely the cause of their suicide. It's up to you to prove that this lawsuit caused him to commit suicide, and he wouldn't have otherwise.
For example, why did David Foster Wallace kill himself? He was at the top of his career, critically acclaimed author, had a loving partner, and yet he still took his own life.