@ATC Watcher; where did you get this information from? It makes it sound like it was obvious as daylight and if so then those around him should bear some responsibility. Bearing in mind his parents disagree with the findings of the investigation and claim it wasn't suicide - they can't be included in your statement.
When a person commits suicide part of the pain of those left behind is the feeling that they should have seen it coming and should have done something - they feel in some way responsible. But the sad reality is that if it was that obvious then either someone would have done something to prevent it or they are complicit in the process (in general).