Having had the fortune and mis-fortune of personally knowing quite a few Catholic clergy predators and even more of their victims, I can say that the accounts of Sandusky's behavior ring very familiar.

Join / create an organization catering to kids at risk, who are already vulnerable, give them special positive attention, then move in for the "kill."

What also rings true is the organizational response: "Let's see if we can keep this quiet." "Will handle it within the family." "Trust the higher-ups to do the right thing (even when it's obvious they didn't)." "Don't make waves."