What do you about the innocent tax payer slaving daily to feed and house criminals who sit in jail reading porno mags, eating, drinking and lifting iron whilst someone somewhere (if they are lucky enough to be alive) re-lives a nightmare?
The death penalty is more expensive directly to the taxpayer, and indirectly it seems to have no effect on reduction of crime rates.
As for someone re-living a nightmare, killing the person who did it will not erase history.
Instinctively the death penalty seems like the right idea, when you look at how it actually works out, it is not.