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GP was postmarked October 11, 1969, and the only letter known to Ql | 10/16/69 AIRTEL AIRMAIL TO; DIRECTOR, FBI ATTENTION: FBI LABORATORY FROM: SAC, LAS VEGAS (9-New) (P) 170 ~ VICTIM _/ EXTORTION 00; LAS VEGAS On 16/15/69, LARRY BORK, Chief of Security, Flamingo Hotel and Casino, Las Vegas, Nevada, furnished thirteen letters received at that hotel addressed to the hotel and to FRANK SINATRA. Readable postmarks on these letters reveal that they were mailed at Joliet, Illinois, between the dates of October 11, i969, and October 14, 1969. Three of the letters contain a postmark which ig not readable. All of the mail received with the fon of one piece has been contained o the Bou ’ cago, noig. e letters whic LTC have been postmarked that date, contains ex message on the back of a paperback book cover of "Sinatra and His Rat Pack" by RICHARD GEHMAN. The letter continues ona t d of the. Illinois Security Company and is signed Thia letter in effect demands that FRANE Stet nore iene eleven { million dollars in unmounted diamonds for two million dollars ‘pefore Christmas of 1969, or the writer will kill SINATRA, with the alternative being that SINATRA donate two million dollars to the Vatican in Rome, Italy. (3) - Bureau fa a arcrm a = (1 - Packag 2 - Chicago (Enc 2 - Las Vegas RIM: jc J (7) i : a . ‘7 ~~ » ins { MP]