nope. i think its a far worse punishment to keep somebody alive and suffering (stuck in jail for the rest of their life).
also, sometimes it turns out that the person was not guilty. how can you say, 'alright u'r free to go' when they're already dead?
also... what's the point of commiting another murder? shouldn't the people who killed the "real" murderer be charged for the same thing? i know the rules and all, but killing is still killing... it does not really teach others not to kill if the government does the same thing.
just my opinion