My guess is the court will order a psych exam (pretty standard in these kinds of cases) and then we'll see what the experts say. Again, just a layman's option, but based on those pictures it sure looks like there is a very lost personality in there somewhere (not that it excuses mass killing).
option—>opinion (hit the POST button too fast)
I'm not familiar with PhD programs, but if he had failed his orals, would they have given him the option of voluntarily withdrawing rather than being officially kicked out?