In light of the execution of Troy Davis last night.
The death penalty isn't a deterrent any more than life in prison is. It doesn't save money - in fact it costs more. And mistakes have, and will be made: "Newly available DNA evidence has allowed the exoneration of more than 15 death row inmates since 1992 in the U.S." wikipedia
Politics have become extraordinarily complicated these days, but I feel that all political parties, & all faiths, & all sensible people should be able to unite and abolish the death penalty without hesitation.