The thing is, though, he went straight to the school authorities. Those authorities then took the rapist's keys to the school and told him to not bring the kids round there, again. They didn't call the police, at all. They've since been quite rightly fired from their jobs.
Why aren't people more pissed off at these people instead? Or even the actual rapist? It seems wrong, to me, that he's being vilified more so than those people. That these acts went on for so long is horrendous, of course, but be mad proportionally, and assign more blame to those officials.