The shocking 2022 murder of four University of Idaho students have resulted in a life sentence for the killer and still-unanswered questions — about new genealogy tech, media exposure, lessons for law enforcement —worth Thinking Twice about. John Donvan sits down with journalist Vicky Ward, who co-authored with James Patterson “The Idaho Four: An American Tragedy,” and discuss what drew her to the case, how collaborating with Patterson changed her process, and reconsidering elements of the criminal justice system.