WRNI – Boston University has completed an internal investigation into allegations of mismanagement at WBUR, the station that owns and operates WRNI. It finds problems with some contracts and reimbursements for personal expenses, but no evidence to support what the university says were more serious charges. Although several of the violations are tied to former WBUR general manager Jane Christo her attorney maintains that she has been vindicated. This investigation is not connected to a review of the sale of WRNI that continues at the Rhode Island attorney general's office. WRNI's Martha Bebinger has more.