Tell that to the victims' families.
But short of that, spending the money and applying the technology necessary to safely confine somebody for life doesn't seem too high a price to pay.
Let's see...pay hundreds of thousands or even millions on babysitting this scumsucker for the rest of his natural life or spend a couple of bucks on some chemicals...hmmm
Bottom line, this ANIMAL forfeited his right to continue using our air when he pulled the trigger and/or encouraged Malvo to do the same. He's a dead man, end of story.