Almost everybody knows John F. Kennedy was shot in the head and killed by a sniper while riding in a convertible through downtown Dallas in 1963. But what about his brother, Robert?

Didn’t he get shot and killed too? And didn’t his assassination - yes, hard to believe two brothers died the same gruesome way -  become shrouded in controversy just like the assassination of JFK? Yes, yes and yes.

“RFK Must Die,” showing on the Documentary Channel this Sunday, June 29th at 5 p.m. (Eastern time), does all the research you want to do - but never get around to doing - regarding this national tragedy.

Was it a solo act of terrorism by a Palestinian-American  named Sirhan Sirhan, a man angry with RFK, the Democratic presidential nominee, because he planned to buy 50 war planes for Israel?

Or did the U.S. Central Intelligence Agency play a role in Sen. Kennedy’s death? Maybe Sirhan Sirhan was just a brainwashed pawn in the game. Investigators say they found a notebook in which Sirhan had repeatedly written “RFK Must Die.” Watch the documentary and see for yourself.

Not often is it OK when Martin Scorsese - who made the excellent Bob Dylan documentary “Don’t Look Back” and the Rolling Stone’s concert doc “Shine a Light” - hands off a Bob Marley project to someone else. But it is in this case.

Jonathan Demme, another great filmmaker, has agreed to direct a film about the life and music of Marley, the world famous reggae artist and songwriter. The untitled project is due for release Feb. 6, 2010, the 65th anniversary of Marley’s death, according to Variety.

Like Scorsese, Demme directs documentaries as well as narrative features. Demme’s most recent doc work includes “Jimmy Carter Man from the Plains” and “Neil Young: Heart of Gold,” and, of course, “Stop Making Sense” his well-known Talking Heads concert film.