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iy : a0 Tg UTED BTATES cover her 9 b : Memorandum . ATAUEIUUE WHAT ro: DERECTOR, FBI (76-26295) mame: 6/25/62 = NF _ ATTEN: FBI LABORATORY FROM : SAC, SAN FRANCISCO (76-2887) Oa . a el , SUBJECT? OOS reuk Lee JMOkRIS oa t Re San Francisco letter to Director dated 6/22/62, Wo which forwarded what was believed to be cement which been dug out of holes in the cell of an Alcatraz inmate, by prison offic ° was assigned to co AEB on September 10, he 1961, He den making the holes and claimed that they were probably made by an inmate formerly assigned to that cel}. It was ascertained [ron ea. 8. Penitentiary, Alcatraz, on e 22, e time white cement paint, water mix, was ordered by that institution was on October 10, 1961, and it was not delivere until October 27, 1961. This was purchased through GSA and is hy listed as GSA article 8010-286-7721. This is the only type of * cement paint that _hag been used inside of the cell block at the/- penitentiary. advised that if you mixed a small amount of water with the white cement paint it would dry very quickly. Then the inmate who was camouflaging the hole would in aii bf probability use some of the regular prison paint to go over the: {1 a of the cement paint and this would camouflage the hole . a h Fé & ade available a sample of the white cement paint used [/ y the institution as described above and it is being submitte in four plastic type containers. 4 There is being submitted a sample of the prison type paint utilized in painting the cells at the penitentiary. The FBI Laboratory is requested to analyze the material believed to be sement paint which was submitted by referenced _ letter and ascertain if it is a similar cement type as to. the enclosed known,eample of cement paint. In addition, the Laborat is requested to- analyze the torques’ appearing paint which is v peing submitted and which 18 used by the penitentt einting Anmates cells. ‘The material dug from the hole of bre +3) pureau, {Ax} (AM) «= Blbe-Gveew Pra used in cetts —. 6 ~ -Package) — im Z Francisco - While cement pear / 6- ae tA a 76 -~) x ee ) wa a LUE resin Bi, gs 10 82 , dm asi