Sure about that?
Catechism of the Catholic Church:
2267 Assuming that the guilty party's identity and responsibility have been fully determined, the traditional teaching of the Church does not exclude recourse to the death penalty, if this is the only possible way of effectively defending human lives against the unjust aggressor.
But doesn't it say in the bible that God decreed that the punishment for murder was death, because of the great value He places on human life?
Or, don't Catholics read the bible?