You answered the question !!!
Why are you acting as if this was a new thing, as I first referenced the non-culpability of the executioner under the conditions you specified previously back in post 150, which was about 1/3 of the thread ago. Thank you for finally noticing.
Error one if the executioner knows the individual to be innocent he must refuse the duty. If the executioner does not know the individual to be innocent he is shielded. If the executioner is under duress he may be shielded.
There is a substantial difference between
knowing someone is innocent versus your original wording (in post 146) which was a much lower bar of simply not believing their guilt had been reasonably established. Under the US system of law, someone with that sort of direct knowledge of the crime wouldn’t be allowed that kind of access to that particular convict anyway.
Error 2 Natural law covers the information in error 1, Natural Law does not allow a state such authority, Natural Laws reduces state authority.
How am I in error with a position that Natural Law defines the scope and limit of authority, or that the Church has identified that temporal authority - including the authority to make a determination of how to best serve the common good - is the sole domain of the State?
The state is allowed what men agree to and that agreement cannot contradict Natural Moral Law so the killing of innocent people cannot be a state right.
Which brings you right back to a statement made as an absolute that is immediately contradicted by the concept of Just War, which the Church indicates is compatible with Natural Law, even when indiscriminate ordinance is used. I’ll cede that the State has no authority to
intend to bring about the deaths of innocents, but double effect applies. If the State was
intending to execute an innocent party, that is an altogether different thing from a moral perspective than doing so in error despite a reasonable attempt to make that determination in a just manner.
The YOU SHALL NOT KILL (Murder) is in Natural Moral Law and thus cannot be given to a state. When a man knows or believes another man to be innocent he is under Natural Moral Law not to murder.
The misuse of the term murder when applied to a capital sentence imposed by the State was addressed long ago, with those attempting to misuse the term making no effort to defend that usage. No person or group has the authority to
murder, but the Church agrees that the State has the authority to impose a capital sentence. Therefore, it is a false equivalence to equate application of the Death Penalty with “murder”.