Pennsylvania prosecutors are considering criminal charges against former top Penn State University officials for allegedly concealing what they knew about the conduct of former assistant football coach Jerry Sandusky. As Sandusky's trial began [on June 11] on 52 counts alleging that he abused 10 boys over 15 years, the sources said investigators had obtained new evidence, including internal university email messages and other documents. Prosecutors [said] they included a file on Sandusky that was created, maintained and possessed" by former Penn State Vice President Gary Schultz. In addition, prosecutors said, the recently discovered emails "contradict" the testimony of Schultz, former athletic director Tim Curley "and others" before a grand jury about what they knew about an allegation of possible sexual misconduct by Sandusky. Both men were charged with perjury for their testimony regarding Sandusky last November. The documents, the sources say, show that former university President Graham Spanier and others discussed whether they were obligated to tell authorities about a 2001 allegation involving a late-night encounter in a Penn State shower room between Sandusky and a young boy, both of whom were naked. The documents allegedly show that university officials even did legal research on whether such conduct might be a crime. But in one email exchange, Spanier and Schultz agreed that it would be "humane" -- to Sandusky -- not to inform social services agencies.