This article says he has a girl friend.
http://heavy.com/news/2015/05/marcell-willis-grand-forks-air-force-walmart-north-dakota-gunman/
So he is probably not a pipe smoker/fudge packer.
Based on his appearance, he looks like a nice person.
Depression can hit anyone for a variety of reasons that have nothing to do with homosexuality, muslims, racism, or any other labels we can stick on this guy.
The fact he was serving his country tells me he was on the right track at one time.
Looks like a recent convert, based on the new-ish photo on his FN page