When he was 14 years old, Ron Bishop testified in a murder trial. Decades later, he told an investigator everything he said on the stand was a lie – and that it was just what he was told to say. Say hello on Twitter, Facebook and Instagram. Sign up for our occasional newsletter, The Accomplice....

When people started saying that John D. Rockefeller Jr. was responsible for the deaths of two women and 11 children near a coal mine in Colorado, he decided to do something unusual. He hired “the father of public relations.” Scott Martelle's book is Blood Passion: The Ludlow Massacre and Class...