It is worth nothing (although he may very well be guilty) that all of the early reports of this tragedy indicated multiple shooters, multiple suspects and that this guy is one of them. Also I hate to have to say this, but this is the USA. People are innocent until proven guilty in a court of law here. I remember 1995 when everyone was immediately blaming the Aye-rabs and it turned out to be McVeigh.
As an aside, I find it hard to believe that a psychologist was able to shoot 43 people on an Army base full of trained soldiers before being taken down. My suspicion is that there were multiple shooters and that this guy may have been one of them. They may be keeping the identities of the other suspects secret for security reasons.