Fifty years on, questions remain

Errol Morris has an article in The New York Times about the Kennedy assassination and, on the 48th anniversary of the assassination of President John F. Kennedy, he takes a critical look at the man seen standing under an open black umbrella at the site:

The Kennedy assassination changed Tink’s life. In 1967, he was an assistant professor of philosophy at Haverford when he published Six Seconds in Dallas. Short, simple and quietly convincing, it is still one of the best books written about the assassination.
Ten years later, Tink left academia and became a private detective in Northern California. Now he has returned to what has haunted him for fifty years: Frame #313 of the Zapruder film, and our inability to come up with a definitive account of what happened in Dallas.
Is there a lesson to be learned? Yes, to never give up trying to uncover the truth. Despite all the difficulties, what happened in Dallas happened in one way rather than another. It may have been hopelessly obscured, but it was not obliterated. Tink still believes in answers, and in this instance, an answer. He is completing a sequel to Six Seconds, called Last Second in Dallas. Like its predecessor, this book is clearly reasoned and convincing. Of course, there will be people who will be unmoved by his or any other account. This is a dogfight with too many dogs in the fight. Most people have already staked out their commitment.
I am fascinated by Tink— see also my earlier short film on him, The Umbrella Man— because he is obsessed with the photographic evidence. Not that you can read the truth of what happened off a photographic plate, but that photography can lead you to the truth.

Rico says we may never know what actually happened in Dallas fifty years ago, but there will be books and movies on the subject decades from now...