I paid no attention whatsoever to this short Errol Morris / N.Y. Times doc about the JFK assassination when it appeared six weeks ago. It’s obviously just a chat with Josiah “Tink” Thompson, a murder investigation expert who wrote “Six Seconds in Dallas,” which asserts a conspiracy. Morris’s mini-doc is haunting, but if you want the real goods watch the video of a Thompson lecture after the jump. Watch the whole thing but pay particular attention to the finale, which synchs up Dealey Plaza dictabelt sounds with the Zapruder film.