Ex-Penn State officials face cover-up charges charges today in the fallout from the child sex abuse scandal at penn state university . nbc's national investigative correspondent michael isikoff has more for us. reporter: one year after jerry sandusky was arrested and charged with sexually molesting young boys , pennsylvania attorney general linda kelly is today set to announce what is being described as a major new development in the case. sources tell nbc news that prosecutors are preparing to charge graham spanier with perjury and obstruction to cover up the allegations against sandusky . in addition, they have prepared new charges against two other former school officials who have already been indicted, athletic director tim curley and gary schultz. these charges are based in part on e-mails uncovered in a report last summer by former fbi director . prosecutors will contend that the e-mails show that they agreed not to report a 2001 allegation that sandusky sexually abused a young boy in the penn state shower room. the ex-officials have all vehemently denied the charges and he said he was only told sandusky was quote, horsing around with the boy. one of his lawyers said last night they are preparing to make their own statement later today . thank you very much.