And if Jack was told of an incident serious enough to cause PSU to revoke Jerry's guest privileges, what were his legal and professional obligations?
I don't think JR was told of a serious incident. Whether, as untrained professionals, they were worried that a minor was using their facilities and could be hurt (say lifting weights), or that their use of the facilities could lead to a false CSA report... lots of options for reporting to TSM that don't include a report of something serious. JR was the trained professional who needed to do more than just take what he was told at face value.