In 1975, labor union leader and American icon Jimmy Hoffa went missing. Forty-four years after Hoffa’s disappearance, the crime remains one of America's greatest unsolved mysteries. One of those frequently considered a suspect in Hoffa’s murder is Chuckie O’Brien, Hoffa’s longtime right-hand man. O’Brien also happens to be the step-father of Lawfare co-founder and Harvard Law Professor Jack Goldsmith. In a new book, "In Hoffa’s Shadow," Goldsmith details his own rigorous investigation of Hoffa’s disappearance and explains why the long-held assumption of Chuckie’s role in Hoffa's death is misguided. Yet, the book is more than a murder mystery. Goldsmith also reflects on the evolution of his own relationship with his step-father. At the Texas Tribune Festival, Benjamin Wittes sat down with Goldsmith to discuss his new book, how he came to write it, and his relationship with Chuckie. See acast.com/privacy for privacy and opt-out information.