Canon 15
That bishops and presbyters shall not kill [any member] of the familia of the Church without the examination of a judge, [even] for serious crimes that are condemned by the decrees of law.
If royal piety has deemed it worthy to issue decrees of his law for the salvation of the people, why shall the holy religion not institute by order of the holy council what shall be observed in every respect? Therefore, it pleased the holy council that every episcopal authority shall moderate its anger and never presume to mutilate the body of anyone from the familia of the Church, whatever offence he or she committed. If such a guilt comes to light, a judge shall be summoned, and [the suspect] shall be taken for examination to investigate what has happened. And, as it is by all means just that the pontiff does not infer the most severe punishment, whatever is verified before the judge shall not be corrected for the severity of the discipline without disgraceful decalvation, and the guilty person shall be transferred by his bishop or by the faithful to the person who will perform the injury prescribed severely by the law, or the bishop will be allowed to sell him or her, if he wants. We have also learnt that some presbyters, after having fallen ill, inferred punishments on the familia of the Church, saying that some of its members practised sorcery, and thus they tortured them by their authority and harmed them because of this great impiety. It pleased us to emend this by the rightfulness of this sentence. We decree then that if a presbyter says that he suffers such a thing, he shall inform his bishop about this. The bishop will order a judge, assisted by some good people from the entourage of the bishop, to investigate, and if they prove these crimes they will tell this to the bishop. Only after he declares the sentence can the damage of mutilation be performed, so that no one else presumes to do that. If someone fails to observe this decree, he shall be punished with excommunication [and removed from the clergy].
(trans. M. Szada)