Spanier has to be concerned as to what internal communication regarding Penn State child abuse has been recovered by the committee.
Freeh is easily corruptable which is why Penn State selected him to head up the internal investigation. Freeh is more attached to clearing his friends than he is attached to the rule of law. However, he has no control over the criminal justice process in this situation and has to be careful not to be an obstructor of justice.
Those internal communications may not be relevant to the Sandusky trial, scheduled to commence in June. However, they'll be relevant to the Curley and Schultz trials for perjury (if I'm not mistaken, the charges for failure to report may no longer fail within the statute of limitations) if either of those gentleman are on the receiving end. If they're not, or if others are cc'd, then there may be others who'll be called before a/the grand jury (I don't know if the term of the November 11 grand jury has expired or if a new grand jury must be empaneled).
These emails will also be key in any possible perjury charges against Spanier - regarding whether his previous testimony that he had no knowledge that that Sandusky's 1998 problems involved matters of a sexual nature and other testimony already given by Spanier before the grand jury regarding what he knew and when he knew it.
If the information in these new emails is damning to Spanier, then that information may also raise issues regarding what Spanier either withheld from the Board of Trustees . . . or what the Board of Trustees knew from Spanier and when the BOT knew it.