Sorry, the guy is 89 which invalidates your entire scenario.
I apologize we had to burst your bubble.
So he was motivated to do this by Henrik Ibsen?
Fox news says von Brunn was 88. So does the great Wikipedia here: http://en.wikipedia.org/wiki/United_States_Holocaust_Memorial_Museum_shooting
So, I still think that if he ever comes to consciousness, von Brunn should be asked about his age and his deed.