Twenty-three years after the fatal shots rang out in Dallas, questions about the assassination of John F. Kennedy still reverberate. The 1964 Warren Report concluded that Lee Harvey Oswald, acting alone, shot the President from the Texas School Book Depository. But 15 years later, the House Select Committee on Assassinations, while agreeing that Oswald was the murderer, decided he was most probably part of a conspiracy. Though some of the evidence leading to that finding has been discredited, conspiracy theories continue to proliferate, tracing the crime to everything from a Mafia cabal to the CIA.
Now an extraordinary television trial has...