What About Hassan Nidal?

http://news.yahoo.com/awol-muslim-soldier-guilty-fort-hood-bomb-plot-205502556.html  Noteworthy here is the relative swiftness of the indictment, trial and judgement.  However, as is clear, although there was a serious possibility of harm to people, it was a plan and no one was killed.  However, Hassan Nidal killed 13 soldiers in cold blood as they were deploying.  He was himself shot and treated and is still being treated at tax payer expense while the families of the dead soldier have only their grief.  The murders by Nidal were on video tape and any jury can see him actually walk up to soldiers and murder them.  But what has happened?  He has not gone to trial and I cannot understand why?