People in Lexington know all about Derby winning jockey Isaac Murphy; or do they? In Isaac Murphy: The Rise and Fall of a Black Jockey, historian Katherine C. Mooney finds that the superstar athlete was both an American hero, employed by the country’s elite to ride their prized horses, and a Black man living in a racist country, who for every success he achieved could never be truly seen beyond his skin color. She recently spoke with WUKY's Alan Lytle.