In an appendix to Gerald Posner’s 1993 book Case Closed, the author argues that the Warren Commission was correct: Lee Harvey Oswald, acting alone, killed John F. Kennedy. For this graphic analysis, the assassination was divided into four main areas. Evidence is brought together — including startling computer projections — that trace the bullet’s trajectories back to their origins. The author, section editor, researcher, and graphic artist worked together closely to decide which elements of the report warranted visual explanation and how they could be best displayed.