The Death Penalty is 100% effective in preventing future criminal action by the condemned.

~ This includes violent actions against the prison population.

The Church recognizes the authority of the State to implement the Death Penalty.

~ Based upon self-defense justifications, providing non-lethal means cannot secure society from the criminal's violence.

"It is in no way contrary to the commandment ‘thou shalt not kill' … for the representative of the State's authority to put criminals to death."

St. Augustine

But is it still necessary?