I completely disagree with Kisuke Hellsing, death for those sort of people is the easy way out. They should be put in the worst f#cking sh#thole imaginable and left there to rot and suffer horribly for the rest of their lives. Thats the only just thing to do.Make them suffer like they made others suffer.

Unless you are religious and believes he will go to hell upon execution. Then he'll suffer for eternity.