Robert David Johnson (born 1967), also known as KC Johnson, is an American history professor at Brooklyn College and the City University of New York Graduate Center.
He played a major role in disseminating the facts about the Duke University lacrosse rape case in 2006-7.
In 2007 he co-authored a book, Until Proven Innocent: Political Correctness and the Shameful Injustice of the Duke Lacrosse Rape Case.