HARRISBURG, Pa. (CBS) — The Commonwealth’s case against three former Penn State officials who had been charged with covering up the Jerry Sandusky sex abuse scandal suffered a severe blow Friday with a ruling by state Superior Court.

The Superior Court ruling means the dropping of some charges against former Penn State President Graham Spanier, and two other former administrators, Tim Curley and Gary Schultz.

Lawyers for the three men had argued that there was confusion about their clients’ legal representation when they appeared before a grand jury along with a Penn State attorney.

Now Superior Court has ruled that the Penn State attorney’s testimony against the trio should not have been allowed. Charges of perjury, obstruction of justice and conspiracy have been dropped against Spanier and Schultz, while charges of obstruction of justice and conspiracy have been dropped against Curley.