Not just theoretical for me...I come from a very anti-death penalty family; in fact it has hurt my father's career as a judge in California that he personally opposes it.
Even if my child were the victim I don't think I would ask for it because it would feel vindictive; like sinking to the level of the beast that did X to my child. 'Course if the sentence were handed down, I wouldn't be out there campaigning for leniency, either. Locking them up and letting them suffer, quite happy with that.
I don't think Death Penalty works as deterrent, either. People like Huntley or Saddam Hussein do what they do because they think they won't get caught at all, or they have poor impulse control and can't envision consequences, either.
Apparently IH had a pretty unpleasant upbringing (not that that excuses what he did), but his mom's statement does seem to suggest she hasn't been the best mam in the world.
Not previewing, 'coz i don't know what thread this will end up on if I do!