I've done as much as I can. Called the Lake Havasu police, was on and off the phone with them til 5 am, emailed them his messages, and just emailed them his IP address as given to me by one of the admins.
I'm going to be really, really honest. I only had to read a single line to know this was a suicide note. I know from experience: I wrote something shockingly similar in a time of my life I'd rather not recall, where I felt there was absolutely no hope. Hell, when Might & Fealty was launched I had a bit of an emotional hiccup and was about to go for my last living drive, but noticed M&F's existence and made Lord Alekhsandr Aurea in Arrakesh. If not for the distraction and calmness M&F gave me, I can't see a single reason why I'd still be alive.
I really, really, really hope its a hoax, but can't possibly dismiss it until I know for sure. Its far, far too personal to share, but if you could read the letter I wrote the night I nearly died, whose scars I look upon every day as I wake up, they sound very similar. I, too, have a habit of going into third-person. There's a particular purpose: emotional detachment. To accept one's fate, the prospect of leaving the world behind, they must put aside their fears and worries. This feels good: in fact, I'd say its often the precursor to the suicidal tactic in and of itself. As we begin to allow hopelessness to flood in, we are strangely give hope... Hope that we can end the pain. We become characters ourselves - actors in our own self-destructive drama, as a method of detachment. A skill we've honed to its apex in games and forums such as these.
So I really don't think this should automatically be dismissed on the grounds that its overly-dramatic or in third-person. As someone whose spent most of his life in therapy and hospitals, let me tell you: when your life sucks and you bottle it all in, all your misery find a way to come out. My mother's best friend: a wonderful, proud, gentle-voiced yet out-spoken intellectual, a proper lady of 69 years old - died of leukemia in 2013. She was quiet til she got stuck in a wheelchair and the fear of immobility, of inaction, of losing control of her own fate, became apparent. She died proud, loud, and in charge - to the last moment. Its not the same situation, but its the same psychological basis for an emotion-based reaction to externally-limiting stimuli that question or endanger one's sense of self-sufficiency, independence, and ability to continue on with the same or similar quality of life.