CALL. THE. POLICE.
And if evil and scandal is found, take administrative action right away and likewise report such findings and results to the faithful. This is hard ball now, but it would not be necessary were it not that so many boys (and some girls) have been mistreated by perverts.
If not, why then perhaps some irate lay Catholic activists in the ranks are liable to employ their own undercover PI's to get to the 'bottom' (sorry for the double entendre) of this mess in the most 'notorious' lavender seminaries.