Agency: FBI
Originator: FBI
From: LEG, MX
To: DIRECTOR, FBI
Document date: 4/10/64
Document type: PAPER, TEXTUAL DOCUMENT

## Page 1

Released under the John F Kennedy Assassination Record Collection Aot 0F 1992-111 156 2107-Hotel.

DATE:

11-14-2017

JFK ASSASSINATION SYSTEM

IDENTIFICATION FORM

AGENCY INFORMATION

AGENCY: FBI

RECORD NUMBER: 124-10275-10295

RECORD SERIES: DE

AGENCY FILE_NUMBER: 62-3550-163. 164.

DOCUMENT INFORMATION

ORIGINATOR: FBI

FROM:

TO:

TITLE:

LEG. MX

DIRECTOR. FBI

DATE: 04/10/1964

PAGES:

SUBJECT:

DOCUMENT TYPE:

ORIGINAL

CLASSIFICATION:

REVIEW DATE:

STATUS

12

SEE FBI 62-109060-2987

PAPER. TEXTUAL DOCUMENT

Unclassified

01/29/1996

Redact

NEW

CLASSIFICATION:

UPDATE DATE:

02/14/2001

RESTRICTIONS:

JFK Act 6 (4)

COMMENTS:

INC LHM, MEMO

DocId: 32200416

Page 1

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## Page 2

Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Note) :

DATE :211-14 2018

FROM

LEGAT, MEXICO CITY (89-6) (RUC)

SUBJECT:

ASSASSINATION OF PRESIDENT

eDD/GAT

JOHN FIIZGERALD KENNEDY,

NOVEMBER 22, 1963, DALLAS,

TEXAS

Declassily on DeCR(JFK)

MISCELLANEOUS INFORMATION CONCERNING

A1.1

ECLSSAFIED BY SE

1N8/1091

ENCLOSURES:

OUTCHMISE

Enclosed are 37 copies of a letterhead memorandum

dated and captioned as above, of which 25 copies are for the

Dallas office, one copy for the detroit office, and one copy

for the New York Office::

REFERENCES:

=

IPTIONAL" FORM NO. 10

i:5070-101-02

UNITED STATES GOVEKNMENT

Memorandum

(99"

TO

DIRECTOR, FBI (62-109060)

DATE:

4/10/64

Mexico City letter dated 3/11/64, entitled "REVA

PRANK BERNSTEIN,

SM - C" (BufIle 100-343413, DE f1le 100-1817,

MC f1le 100-2363) and "JOSEPH BERNSTEIN, SM - C" (Buf11€

100-68623, DE file 100-1817, MC file 100-2367); Dallas airtel

to Bureau dated 3/19/64, with triple caption of Instant case;

"LEE HARVEY OSWALD, aKa,

IS - R- CUBA" (Bufile 105-82555,

f1le 44-1639),

concerning reporting procedures to be followed;

bureau cable #20, dated 4/1/64; and Mexico City: cable #523,

dated 4/3/64.

ADMINISTRATIVE.

Referenced Bureau cable set forth that additional

instructions were being submitted to the New York and Detroit

offices.

The Mexico City Office 18 not In receipt of these

Instructions, and it is suggested,

1f it has not already been

done, that the New York and Detroit Offices be Instructed to

14

62-3550-64

Bureau Encs.

- 37)

1 - Liaison Section)

-Dallas,

89-43m Pnese

= Detest

Infor Enc.

New York, Info.,b

Mexico City

25)

(15):

DocId: 32200416 Page 2

1 Стри

IRM With

Rs

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Released under the John F. Kennedy Assassination Records Collection Act of 1992 (11 USC 2107

Hotel:

DATE: 11-14-2017

MC 89-6

proceed carerully in any investigation o1 this matter in order

not to compromisexMEX-18

and MEX-19, Bureau Informants operating!

In Mexico (4)

That cable requested that MEX-18*and*MEX-19 be pinned/ &

down regarding specifics.

These iniormants were recontacted

on 4/2/64 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-

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.

With regard to EVE NIDERMAN, It Is noted that MEX-18

and MEX-19 hadno Information regarding her. @(u)

SOURCES:

The confidential source mentioned in enclosed letter

head memorandumfis MEX-18 and MEX-19 (MC fIle 134-10A), whoLU)

were contacted

by SA NATHAN L. FERRIS on 1/8,21; 2/6,13,26;1

4/2/64.

The second source is NY-384-s.

The third source 1s CSNY-2551-s (Address of ELF).

CLASSIFICATION:

The enclosed letterhead memorandum 1s classified

"SECRET" to protectivEX-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 1s essential that the identity of these

- 2 -

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## Page 4

Released under the John F. Kennedy Assassination

Records Collection Act of 1992 (44 USC 2107 :

Hotel.

•ATE: 11-14-2017

MC 89-6

informants be fully protected, especially since they are the

only source which received the information 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 interest

this reason the letterhead memorandum is classified

to the continued operations of the Bureau In MexicO ASECRET.

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

the results of reinterviewwith MEX-18 and MEX-19 Joe Incorporated

Into a letterhead memorandum suitable for dissemination to the

President's Commission.

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.

-3-

DocId: 32200416

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