The judge overseeing former Penn State assistant football coach Jerry Sandusky's child sex-abuse case said he would rule later on a number of issues raised at a pretrial hearing Thursday, including a request to have the charges dismissed.

During a 20-minute hearing that Sandusky attended, defense attorney Joe Amendola asked Judge John Cleland — if he opts to deny that request — to deny it without prejudice so he can raise it again later.

Prosecutors said more information about Sandusky's conduct could result from an ongoing grand jury investigation. Cleland met with attorneys behind closed doors after the hearing to set deadlines for disclosure of other information before trial, including anything resulting from the grand jury investigation.

Amendola also told the court that the attorneys for two key witnesses — Penn State athletic director Tim Curley and former vice president Gary Schultz — had informed him they would invoke the Fifth Amendment if called to testify at Sandusky's trial.

Curley and Schultz are charged with perjury and failing to report allegations of child abuse. Both have pleaded not guilty.