 Part of my book includes how federal agencies worked actively to thwart Garrison's investigation. Garrison was astonished that the FBI refused to cooperate with New Orleans law enforcement in an investigation of the Kennedy assassination. In fact, J. Edgar Hoover, we know who that is, subverted Garrison's effort. Witnesses came forward to the FBI believing that in providing the FBI with their information, they were simultaneously reaching the district attorney. And the document reads as follows, give Garrison nothing.