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ve ee C O Soe the installation of microphones where trespass was involved. (Exhibit 32) The Director told Attorney Genera] McGranery | that such installations had been utilized on a very limited basis by the FBI and only in cases which directly affected the internal security of the United States. The Director a pointed out that, after this ruling by Attorney General McGrath on February 26, 1952, the Bureau had discontinued nearly all of the microphone installations which involved trespass. Attorney General McGranery told the Director that he thought it was entirely proper for installations of microe- phones to be made in any case where elements were at work against the security of the United States and that, in such instances, where the Director felt there was a need to install microphones, even though trespass might be committed, he would leave it to the Director's judgment as to the steps to take. The Direc this authority would be used only in extreme cases and only in cases involving the internal security of the United States. Discussions to Obtain Modification of Departnent's Interprotat on Of ‘“reconass | For almost a year following the Director's conference with Attorney Goneral McGranery on June 6, 1952,