I said it on the previous thread, but:
Studies have shown that states who restarted or began using capital punishment actually showed an INCREASE in violent crime and murder rates significantly greater than the increase in those same rates nationally.
There is really no difference between executing someone and keeping that person in jail for life with no chance of parole. Other than the fact that the costs less and allows us to right the wrong if we wrongly convicted that person. Once you kill an innocent person, there's no bringing them back.
By the way, here's an interesting little quiz on the death penalty:
http://www.patweb.com/dpquiz/main2.htm