Here's an ESPN article about his struggles with depression and substance abuse. It's sad, judging by the reading I've done on him, it seemed like he was only really comfortable when he was boxing. I also wonder if the damage he took in his boxing career added to it. With all of the recent stories about NFL players committing suicide, it's a little surprising (in a good way) that we don't hear that often about boxers ending their own lives too. Add another "s" below before "ets" in the title, as it is censored. http://asets.espn.go.com/boxing/columns/graham/612133.html
Another good one on Arguello, from 1982. The one in the original post is from 1985. Sports Illustrated used to do an excellent job reporting on boxing. You can still find a lot of good articles on SI Vault. http://www.si.com/vault/1982/04/26/625638/home-is-where-the-heart-is