Are you saying that nobody has ever been wrongly convicted of first degree murder? Conviction alone does not determine guilt.

Besides, it isn't about guilt and innocence. It's about acknowledging that God is the author of human life and the only one who has the right to end it.

The Church teaches that capital punishment is acceptable only when it is the sole means available to keep a dangerous person from harming others. If we have the ability to contain a convicted murderer, as we clearly do, that is the proper moral choice.