There seems to be some confusion over what one should do if, as allegedly happened at [Penn State], one becomes aware of a pedophile sexually assaulting a child, so let us clear that up. Here, step-by-step, is what you do:
1) Make the pedophile stop, preferably by putting him — or her — forcibly against a wall.
2) Resisting the urge to put said pedophile through said wall, make sure the victim is OK.
3) Call the police.
If the rules require you to notify a superior first, allow said superior a reasonable amount of time to call police. Fifteen seconds is a reasonable amount of time.