Johnson, Hannibal B.: - Hannibal B. Johnson, a Harvard Law School graduate, is an author, attorney, consultant, and college professor. He teaches at Oklahoma State University and the University of Oklahoma and has taught at the University of Tulsa College of Law. He has written several books on African American history. His play Big Mama Speaks: A Tulsa Race Riot Survivor's Story was selected for the 2011 National Black Theatre Festival in Winston-Salem, North Carolina. He has received numerous honors and awards for his work and community service.