Dealey Plaza Echo is a journal published by the British Research Group, dedicated to studying President John F. Kennedy's assassination. This issue explores various aspects of the case, including testimony from Marina Oswald, claims that Oswald had a cellmate in Dallas, and the work of Harold Rydberg, a medical illustrator who created diagrams of Kennedy's injuries for the Warren Commission. The issue also examines similarities between Lee Harvey Oswald and Thomas Vallee, a man arrested in Chicago weeks before the assassination, analyzing the theory that Vallee was a "false Oswald." Additionally, the journal provides a timeline of events leading up to the assassination and reviews various theories and controversies surrounding the case.