PMC wrote:
The death penalty has one drawback - it's permanent.
Miscarriages of justice do happen, but you can't bring someone back from the dead. Personally, I view the concept of the state taking a life from anyone with extreme distaste.
Furthermore, nobody is ever really held accountable for said miscarriages, save in the cases of false testimony (or at least I would imagine). Not that they really could be - one can hardly convict the jury / judge of manslaughter.
Another question you could ask yourself include, does it really work as a deterrant? Do places that implement the death penalty have a lower incidence of those crimes that warrant it relative to those (socially/culturally comparable places) that dont?