In Tom O’Neill’s book Chaos: Charles Manson, the CIA, and the Secret History of the Sixties we learn about Reeve Whitson, a CIA agent disguised as a hippie. He was a close friend of Sebring, Tate and Polanski. He also knew Charles Manson. He had advance knowledge of the murders at the Tate house, because he had the house under surveillance. He was at the Tate house after the murders were committed but before the police arrived. Whitson was the one who coerced Hatami to cooperate with Bugliosi during the investigation. He threatened Hatami with deportation back to Iran if he did not cooperate. He not only helped Bugliosi, but he also gave much help to Paul Tate during his private investigation of his daughter’s death.
O'Neill's information on Whitson provides strong support for the proposition that military and intelligence agencies were involved in the Tate LaBianca murders, bringing the CIA’s Phoenix program of assassination and torture of Vietnamese non-combatants home to America. The purpose behind the plot was to incite terror among white people and put the blame on black radicals.