Capital Punishment Deters Murder, and Is Just Retribution Capital punishment, is the execution of criminals by the state, for committing crimes, regarded so heinous, that this is the only acceptable punishment. Capital punishment does not only lower the murder rate, but it's value as retribution alone is a good reason for handing out death sentences. Support for the death penalty in the U.S. has risen to an average of 80% according to an article written by Richard Worsnop, entitled "Death penalty debate centres on Retribution", this figure is slightly lower in Canada where support for the death penalty is at 72% o