too bad that james holmes' grandmother wouldn't wipe the ironic smirk off his face and take the guns/explosives out of his hands

Now it's too late. Still time for others to consider the idea of giving your kid a hug once in a while and sorting out emotional problems instead of buying them a tv set and video games and leave it up to that.
Bad man, bad grandmother.
http://en.wikipedia.org/wiki/Running_amok#Officially_classified_as_a_psychiatric_condition
http://en.wikipedia.org/wiki/List_of_rampage_killers