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FD-302 (Rev. 1-28-80) ' ‘EDERAL BUREAU OF INVESTIGA. ' June 25, 1962 Date b7 Qo | U. 8. Penitentiary Alcatraz ‘ advise 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 ascertain if holes had been dug in the wall. to inmate | dug in the the immediately had n at institution ,proceed : avoid camera photo of the holes located. digging around the ventilator ¢ several additional holes which had been dug 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. ai”: = = Pe: 1a —- Sencanmeumd After probing around in the back part ra) were able to uncover ei of the ventilator grill, take a polaroid photo of that portio the vicinity Se: 2: that the holes dug in the vicinity of the ventilator gr 8 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 by were made available and have been placed in the San Francisco Qe _ tf 6/19/62~ Alcatraz, Cdifornia . SF 76-2887 by Dato dictated This document contains neither recommendations nor conclustons of the FBI. It ia the property of the FBI and is joaned to your agency; it and ite contents are not te be distributed scuteide your agency. -3he of3