The witness is a sister of the accuser's best friend.
Sandusky's defense has called several character witnesses to the stand Tuesday morning as they try to defend the former Penn State assistant football coach on sex abuse charges.
Earlier in the day, Sandusky's attorney says everyone should "stay tuned" to find out if the former assistant coach will take the stand.
Defense attorney Joe Amendola declined to say if Sandusky would testify as he entered the courthouse Tuesday morning. Amendola says the case is like a soap opera, comparing it to "General Hospital" and "All My Children."
Sandusky is charged with sexually abusing 10 boys. He has denied the allegations.