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FD-02 (Rev. 1-25-80) \ ‘SEDERAL BUREAU OF INVESTIGA, dune 25, 1962 Date Wa | U. S. Penitentiary Alcatraz at on June 19, 1962, he and in that institution, checked the cells on er east of B cell block, They particularly : checked the back part of the cell probing along the wall in an effort to pscertain if holes had been dug in the wall. at institution ,proceed of the holes located. states there were 36 holes in all dug in the ¥ tor After uncovering all of the holes, had take a polaroid photo of tha’ of the cell. ee ae: ai: eell, B= ’ ch is assigned to' After probing around in the back part o: were able to uncover ei e WwW of the ventilator grill. ad take a polaroid photo of that por ° Se: :-< that the holes dug in the vicinity of the ventilator grilis in these two cells had been carefully concealed by stuffing paper, soap in the hole and then covering that material with cement paint and paint. It was painted similar to that covering that portion of the cell and the holes were not visible upon first checking ls, The originals of each of the three photos taken Sh. Pea made available and have been placed in the San Francisco . vicinity 6/19/62> Alcatraz, Ceifornia - SF 76-2887 by Date dictated ‘This document contains neither recommendations nor conclusions of the FBI. It ie the property of the FBI and ts loaned to your agency; it and ite contents are not to be distributed outside your agency. <28— 093