No one is suggesting that they not report it. Indeed, they would be obliged to report it if they were to find such evidence. The purpose of the investigation is precisely to look for evidence, so as to weed out false charges that would unjustly destroy the priest's reputation.
The article sounded to me like it was seeking jurisdiction over these types of cases. On rereading the article, I can see the other view - that it must reported to authorities.
But, IMHO, the article adds to the confusion in the second to the last paragraph:
Perhaps it would have been more clear for the author of the article to add a phrase like ", in addition to all other legally required remedies." Or something like that...