You know the photograph – the picture capturing Dr. Martin Luther King Jr.’s assassination in Memphis. As the fallen civil rights leader lies on the balcony of the Lorraine Motel, shot by a sniper, his aides point desperately toward the direction of the shot. But have you ever looked closely at it? There, on the second floor, above the motel’s offices is a man. He peers from behind a curtain – just a shadowy figure whose image seems impossible to bring into focus. Who is he? Why is he here?