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FD-302 (Rev. 1-25-60) ' SEDERAL BUREAU OF INVESTIGA. = { June 21, 1962 Date : Warden OLIN G,. BLACKWELL, United States Penitentiary, Alcatraz, California, was shown the life preserver located on For Cronkhite Beach, California. He noted that it was olive green in color and evidently made from parts of rubberized rain- coats similar to the raincoats issued to inmates at Alcatraz. He advised that this life preserver was almost identical to the life preserver which was located on the top of Celt Block B on ee ee | eee ie Bay §ALA eA £4.22 L142 = Seas ata Te the morning of June ie, 196¢, and that this life preserver was evidently one which the Escapees had utilized. a ~— 6/15/62 Alcatraz, California SF 76-2887 ' s/s by eee Dato dictated On This document contains neither recommendations nor conclusions of the FBI. It is the property of the FBI and is loaned to your agency; it and ita contents are not to be distributed a) your agency, 706 ACPA SAS nn