In truth, as in any institution involving and engaging the public (i.e. the people), you ought to have proper fitted person’s in the field. If that means law enforcement, psychologists, child protective services, foster care, etc.

The truth is agents/entities/institutions already exist. Real authentic persons enrolled in the particular area’s specializing in child protection ought to be working in an office of the Church. Does the Church get clergy to do the payroll for Diocesan staff? Or does She hire an accountant? Does She merely turn religious into mere teachers? Or, does She hire qualified credited persons who teach? I am not opposed to religious teaching. And even Pope John Paul II and Vatican II encouraged religious to earn/gain their credentials in what particular field they were working in the Church. Likewise, have real persons from actual Law, Psychology, and those who have worked in areas regarding protecting children. They should do the training.