CHAPEL HILL, N.C. (AP) — A months-long investigation of academic fraud at the University of North Carolina at Chapel Hill finds the problems were confined to wrongdoing by the former chairman and an administrator of the school’s African studies department and didn’t involve other faculty or members of the athletic department, according to a report released Thursday. The report also finds that the problems go back a decade earlier than previously uncovered.

The investigation led by former Gov. Jim Martin said the university’s Department of African and Afro-American Studies remained at the heart of the two-year athletic and academic scandal that has contributed to the departure of football coach Butch Davis and resignation of Chancellor Holden Thorp.