Due to the appeals process, it's actually cheaper to sentence someone to life in prison than it is to give them the death penalty.
If he gets life, he'll he in protective custody. That pussy wouldn't last 15 minutes in general population. Some things aren't even acceptable to the scum of society. Crimes against children first and foremost, but I think shooting up a theater full of innocent people would qualify as well.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz