Kevin Boyle talked about his book Arc of Justice: A Saga of Race, Civil Rights, and Murder in the Jazz Age, published by Henry Holt and Co. Mr. Boyle used the trial of Ossian Sweet, an African American doctor who was defended on murder charges by the famous lawyer Clarence Darrow to explore the history of race relations in the U.S. during the 1920s. He answered a few questions from audience members.