The film is called Killing Oswald. I haven’t seen it but Mark Groubert has and here is what he said in his review for Crooks and Liars:
“Shane O’Sullivan’s new documentary, Killing Oswald is simple in design and stunning in its veracity. It assembles some of the top JFK assassination scholars and authors and lets them speak. This is something the American media is apparently too reluctant or simply too terrified to do. Possibly both.”
“Here we finally see authors Joan Mellen (A Farewell To Justice), Dick Russell (The Man Who Knew Too Much), John Newman (Oswald and the CIA) and David Kaiser (The Road To Dallas), among others, telling the audience what they have uncovered after years of research.”