From The Texas Tribune (2/13/13):
Dr. Kern Wildenthal, the former president of UT Southwestern Medical Center in Dallas, owes the institution slightly more than $21,000, according to a review conducted by the University of Texas System and obtained by The Texas Tribune.
Wildenthal, who served as president from 1986 to 2008, resigned his position as special assistant to the president in April following the release of a report that questioned his decision-making with regard to discretionary spending.
The initial report, conducted by Paul Hastings LLP, was prompted by questions of impropriety raised by The Dallas Morning News. After its release, system officials indicated that Wildenthal would be expected to reimburse any expenses found to be inappropriate.