The Reverend Martin Luther King jnr, for a period of 13 years, was one of the most scrutinised and filmed figures in American history, from the Montgomery bus boycott in 1955 to his assassination in Memphis in 1968.
But it wasn't just the press watching him. The Federal Bureau of Investigation, which J Edgar Hoover led, took a keen interest in King as he became the de facto leader of the civil rights movement. As King became ever bigger, Hoover's obsession grew as well.
MCT