approved the FBI wiretapping of King and his entourage, due to unfounded suspicions of "commie" influence.
The story is an interesting one, and 'undertold' in the annals of history, IMO:
http://www.theatlantic.com/doc/200207/garrow On October 10, 1963, U.S. Attorney General Robert F. Kennedy committed what is widely viewed as one of the most ignominious acts in modern American history: he authorized the Federal Bureau of Investigation to begin wiretapping the telephones of the Reverend Martin Luther King Jr. Kennedy believed that one of King's closest advisers was a top-level member of the American Communist Party, and that King had repeatedly misled Administration officials about his ongoing close ties with the man. Kennedy acted reluctantly, and his order remained secret until May of 1968, just a few weeks after King's assassination and a few days before Kennedy's own. But the FBI onslaught against King that followed Kennedy's authorization remains notorious, and the stains on the reputations of everyone involved are indelible.
Yet at the time, neither Robert Kennedy nor anyone else outside the FBI knew more than a tiny part of the story that had led to that decision, or even the identities of the two FBI informants who had set the investigation in motion. Only in 1981 were their names—Jack and Morris Childs—publicly revealed, but even then the relevant documents were so heavily redacted that only the most bare-bones sketch of what had taken place was possible.
But now an ongoing FBI "reprocessing" of those documents, pursuant to the Freedom of Information Act, is resulting in the release of hundreds of largely unredacted pages that finally allow the story to be told.
The crucial figure was Stanley David Levison, a white New York lawyer and businessman who first met Martin Luther King in 1956, just as the young minister was being catapulted to national fame as a result of his role in the remarkable bus boycott against racially segregated seating in Montgomery, Alabama. The FBI knew, in copious firsthand detail from the Childs brothers, that Levison had secretly served as one of the top two financiers for the Communist Party USA in the years just before he met King. The Childs brothers' direct, personal contact with Levison from the mid-1940s to 1956 was sufficient to leave no doubt whatsoever that their reports about his role were accurate and truthful. Their proximity to Levison also gave them direct knowledge of his disappearance from CPUSA financial affairs in the years after 1956......