AGENCY: RECORD NUMBER: RECORD_SERIES: AGENCY FILE NUMBER: AGENCY INFORMATION FBI 124-10275-10295 DE 62-3550-163. 164. DOCUMENT INFORMATION ORIGINATOR: FBI FROM: TO: TITLE: LEG. MX DIRECTOR. FBI DATE: 04/10/1964 PAGES: 12 SUBJECT: DOCUMENT TYPE: SEE FBI 62-109060-2987 PAPER. TEXTUAL DOCUMENT ORIGINAL Unclassified NEW CLASSIFICATION: CLASSIFICATION: REVIEW DATE: 01/29/1996 UPDATE DATE: 02/14/2001 STATUS Redact RESTRICTIONS: JFK Act 6 (4) COMMENTS: INC LHM, MEMO Docld: 322700416 Page 1
' Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote) -. . "OUNETED STATES | GOVERNMENT / jemorandan »  SUBIRETE ASSASSINATION | OF PRESIDENT | ai Cou, JOHN: -FITZGERALD. KENNEDY, - . BOBRS NOVEMBER 22, 1963,: DALLAS, - TEXAS MISCELLANEOUS: INFORMATION CONCERNING at 1- : ot : a re oO Mis SS. FE uo vn oe i Vliet DU Se ‘Enclosed. are. 37. ‘copies. Of a lettertiead memorandum” Gated: and captioned as. above, of which 25 copies. are:.for the- .. ‘Dallas. office, one copy for the Detroit Office, and ne. Copy. “| fon, the. New. York’ Ofrice.. ere pe PS 2K, “Mexico  caty letter ‘dated 3/1 /él, ‘entitled -"REVA ae FRANK BERNSTEIN, SM -: Cc" (Bufile 100-343413, DE file 100-1817, MC file 100-2363) and “JOSEPH BERNSTEIN,.SM -'c" (Bufile . -100-68623, ‘file 100-1817, MC file 106-2367); Dallas. airtel ». to Bureau dated 3/19/64, with triple caption of instant case; A - "LEE HARVEY OSWALD, aka, IS - R - CUBA" :(Bufile 105-8255, oe DL: file: 100=10461) 5 and’. "JACK ‘L. RUBY,. aka; ‘LEE: “HARVEY: 0 - |. alka (deceased) - VICTIM; . CIVIL RIGHTS" (Buftle- Aye ~2h016, oa - “file 44-1639),° fess aatea vais and procedures ‘to be’: ollowed; “> Bureau cable: #20, dated 64; and Mexico, City: cable #923, . fated A438 — = a oo Referenced Bureau cable set. forth ‘that. addi: Lo mal. ; “Snatructions were ‘being submitted to. the New York and.Detroit ° Offices. The Mexico City “Office is not in. receipt: of these —— ; . instructions, and at is. ‘suggested, if it: ‘has’ not. ali eady: been: = op Gone. that the, New York. and: ‘Detroit Offices be inst. ictéed: ta” was Docld: 32200416 Page 2
Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote). DATE: 11-14-2017 ; . . r) MC 89-6 proceed carefully in any investigation of this matter in order | not to com romise£MEX-1 and MEX-19, Bureau informants\ operating /. \ in Mexico. Se LA That cable requested that’ MEX-18 nafMEX- 19 e pinned \) down regarding specifics. These informants weré recdntacted on iy /2 Jel and furnished the additional details set forth in the(U) enclosure. These informants have explained that, inasmuch as REVA FRANK BERNSTEIN (Bufile 100-343413, MC file 100-2363) and JOSEPH BERNSTEIN (Bufile 100-68623, MC file 100-2367) are not . presently in the Mexico Area, further details are unavailable. Also, as is pointed out in the enclosure about REVA FRANK BERNSTEIN, the informants advised that the BERNSTEINS, as well as ELIZABETH CATLETT MORA (Bufile 100-395934, MC file 100-939), are not individuals who will answer direct questions and, when questioned directly, they are known to terminate the discus- sion. With regard to documentation in the enclosure on GEORGE WILLIAM CROCKETT, JR, (Bufile 100-367743, MC file . 100-1820), it is noted that the Mexico City file is incomplete . on this and that the Bureau has access to proper documentation. oe With regard to EVE NIDERMAN, it is notedgthat MEX-18 and MEX~19 hadgno information regarding ner -(K SOURCES: The confidential source mentioned in enclosed let ~ head memorandumfis MEX-18 and MEX-19 (MC file 134-10), no(Batin Were gontacted by SA NATHAN L, FERRIS on 1/8,21; 2/6,153, 26; %** 2 | The second source is NY-384-s. The third source is CSNY-2551-S (Address of ELF). CLASSIFICATION: , "SECRET" to protect€MEX-18 and MEX-19,¥who are informants in ‘Mexico furnishing highly sensitive information involving espionage and information vital to the internal security of the United States. It is essential that the identity of these The enclosed letterhead memorandum is classified (WB Docld: 322700416 Page 3
Released under the John F. Kennedy Assassination Records Collection Act of 1997 (44 USC 2107 — Note}. DATE: 11-14-2017 | " ; ' MC 89-6 informants be fully protected, especially since they are the only source which received the formation from ELIZABETH CATLETT MORA, REVA FRANK BERNSTEIN, and JOSEPH BERNSTEIN, who are not known to have discussed the information in the letter- . head memorandum with anyone else’): Under the circumstances, © the protection of these informants‘ is of paramount terest. to the continued operations of the Bureau in Mexico nd for uw) _ this reason the letterhead memorandum is.classified "SECRET, ' COPIES: . - Twenty-five copies of the enclosed letterhead memo- randum are being designated for Dallas, the domestic office of origin, according to instructions set forth in referenced Dallas airtel. : Ten copies of the enclosure are being forwarded to the Bureau inasmuch as referenced Bureau cable instructed that 1 the results of reinterviewfwith MEX-18 and MEX-19 $e incorporated(K) into a letterhead memorandum suitable for dissenfination to the President's Commission. (uw Inasmuch as the Detroit and New York Offices are being furnished additional instructions by the Bureau, one copy of the enclosed letterhead memorandum is being furnished for the information of each of these offices. DoclId: 322700416 Page 4