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Penn State University, Barbara Dennis, Associated Press
In this photo taken July 23, 2008 and released by Penn State University, Dr. David M. Joyner answers questions from the audience at the school's York, Pa., campus. On Wednesday, Nov. 16, 2011, Penn State named Joyner, an orthopedic surgeon who got his bachelor's degree and medical degree from the university, as acting athletic director.

STATE COLLEGE, Pa. — The new leader of Penn State's athletic department is promising change for an athletic program in turmoil after former defensive coordinator Jerry Sandusky was charged with sexually abusing eight boys over 15-year span.

David Joyner was formally introduced Friday as the school's acting athletic director. He says he will make sure that the "core values" at athletics are aligned with the university's academic side.

Joyner takes over a job held until last week by Tim Curley. Curley was charged with lying to a grand jury and failing to pass on a 2002 abuse report to police that allegedly occurred at the football building. Lawyers for Sandusky and Curley have maintained their clients' innocence.

Coach Joe Paterno was also fired. Joyner said there's no timetable for finding a permanent replacement.