In the present investigation, a description is made of the criminal administrative process that the Ordinary can follow in cases of sexual abuse of minors or vulnerable persons committed by a clergyman who is his subject. Be part of the application of c. 1720 of the Code of Canon Law of 1983, which contains a summary of the criminal administrative process; Seeking a better understanding and applicability of said canon, an effort is made to understand the elements contained in it: notion of Ordinary, right to defense of the accused and the participation of the advisors that the canon prescribes. On the other hand, the understanding of the procedural iter is enriched through the analysis of the procedural provisions of the Vademecum (in its version 1.0) of July 16, 2020, which has already been updated to version 2.0 on June 5, 2022 , up to the declaration or imposition of the penalties that the Code of Canon Law foresees in the new c. 1398 § 1 of the new book VI promulgated on May 23, 2021 by His Holiness Francis, through the Apostolic Constitution Pascite Gregem Dei, and which entered into force on December 8 of the same year.