Just to be clear, the conclusion was NOT insufficient evidence to prosecute in 1998. The conclusion was that the report was "UNFOUNDED". They could have made one of three determinations: charge, unable to determine, or unfounded. They determined it was unfounded (i.e., the equivalent that it was fabricated or, if true, didn't rise to the level of being actionable). That is a critically important legal distinction. In short, it would have been absolutely impermissible for anyone to use 1998 against Sandusky for any purpose at any time in conjunction with his employment or otherwise
And for good reason (forget about it in the context of Sandusky but in the case of anyone else): a finding that a report is "UNFOUNDED" (meaning it was false, fabricated, or without any evidence of support that a criminal activity occurred) should never be used against someone; that's why the law is written. Someone falsely accused shouldn't have to live with that stigma. Had Paterno or Penn State (or the Second Mile for that matter) done ANYTHING to Sandusky because of 1998, they would have been acting outside the law.
I am forever amazed that the media is wholly unable to comprehend that fact