I believe it's against the law to let a serious felony go on (and on and on) without doing something (anything) to stop it/report it.
first of all, there's every chance it would be difficult to prove Paterno's knowledge was able to reach such a high standard as set forth above. and second, is this actually true? and further from there, even if it is, why should it be? surely as a libertarian you are sensitive to civil liberties issues. do you not see the danger in requiring people to share information with law enforcement against their own will just because a crime may have been committed?