Classification: arses! (This form is to be used for material extracted from ClA—controlled documents.) Lee Harvey Oswald's trip to Mexico City. (CIA \ Lee Rankin from Richard Helms) Much of the information provided to the Warren Commission in this.xreport was based upon sensitive sources | and methods, identification of which had been deleted completely from the report. | The CIA policy limiting Warren Commission knowledge of CIA sources and methods was articu- lated as early as December 20, 1963, at which time a cable was.sent from CIA headcuarters to the Mexico ‘City Station which stated: _ Our present plan in vassing information . ¥otthe-Warren Commission~is to eliminate mention of[ telephone taps) i in order to ‘protect: your continuing “ops. Will rely “instead on statements of Silvia Duran and on contents of Soviet Consular file TP gle ;: _ which Soviets gave] oO ‘GIA-Docy—FOTA~ Cope ~ #420~757, 12/20/63, Dir “ge 1466) _ The basic policy articulated in the December 20, 1963 cableAis also set forth: in a CIA menoran@in e “of December a. oe it specifically concerned , ‘the CIA's relations with the FRI * (CIA Memorandum for File, 12/20/63, ‘Birch O'Neal, includéd in. with Soft Se ee file materials) In that memorandum, Birch O'Neal og)? of the CIA Counterintelligence/Special Investigations aL Group Seegee wrote that he had been advised by Sam Classi ication: , ‘Ee — — _ i . of boc.: ‘FOUR #509-803, 1/31/64; Memorariduinfor—J... ~ deait a ee ae ‘i, “Wh “GH. “UR WHR, Wi “aH, GBs. NG | &
: . Classification: acs (This form is to be used for material extracted Papich, FBion WAsannttalled decusEats.) that the FBI was anticipating a request from the Warren Commission for copies of the FBI's materials which supported or complimented the FBI's five volume report of December 9, 1963 that had been: submitted to the Warren Commission. Papich provided 6: ‘Neat With 3 nena this report which indicated that, somf United ne States Agency was[tapping telephones in Mexico and asked him whether the FBI could supply the Warren Commission with the sourck of the{itélephone \c ‘ ‘ ree 1 ‘ : ay taps/] ONeals memorandum shows that he discussed this matter with Scelso. After a discussion “GSE, (RR. EA, with Helms, Scelso was directed by Helms to prepare CIA material to be passed to the Warren Commission. “O'Neal wrote: “GR, “ER, = “GE SAN, SE, ER,
Classification: (This form is to be used for material extracted from ClA—<ontrolled documents.) He (Scelso) was quite sure it was not .the Agency's desire to make available to the Commission at least in this Manner-~via the FBI~sensitive informa- tion-which could relate to[ telephone taps;] (CIA Memo for File, 12/20/63, by -Birch\0'Neal,} included in Soft File materials) * Oe ere er eh LQ PP igtoveren Qe ty red ames ‘ ; : : ! r * 4 4 Paras om os ; 2 e oe, — omar : or oi Lee fi 3 os, .? pew 3 rsa. r i] SNe e <i ‘ p> rz eX, (et A foc go. “ Fs ve = N The opinion expressed by Scelso as of December 20, 1963 was set forth on January 14, 1964 in a formalized fashion,’ is’hen Helms expressed his concern regarding exposure by the FBI of Agency sources to the Warren Commission. Helms wrote that the CIA had become aware that the FBI had already: oo called to the attention of the Commission, through its attorney, that we have information [(as deter- . mined from Agency sources)} coinciding } with thé date>when Oswald "was in Mexico City and which may have some bearing on his activities while in that area. . (CIA dissemination to FBI, 1/14/64, _ CIA =z CSCI~3/779/510. TOUA yay -64 ' ~~ Mr. Helms further indicated that the CIA might be called upon to provide additional information acquired from checks of CIA records and agency sources. He suggested that certain policies be employed to enable CIA to work cooperatively with the Commission in a manner which would iy protect CIA information, sources and methods. Among the policies articulated were two which Helms claimed would enable the Agency to control the flow of Agency originated information. In this way the CIA could check the possibility of revealing its sources and methods inadvertantly. The policies articulated were: Classification: «Wf .. : og . Fs EP ed . a. Ce renews to Nad) ee eet ore AR ED. a a a ae “GAO, «WR, RS, NAPs, SAR.
at ‘ . aM ‘adotne tie’ / aki yr ae Aisa? Alea ele pa” cee ten cee . ams . oe = “y — we - oe cen ee Pha Ee ae . . 7 _ (This form is to be used for material extracted o from ClA—conirelied documents.) 7 The CIA policy of eliminating reference to Agency =e, sensitive sources and methods is further revealed by examination of an Agency cable, dated January 29, , 1964, sent from CIA Headquarters to the CIA Mexico £ © é City Station. (CIA Doc. FOIA 2498-204, 1/29/64; " PY DIR 97829) This cable indicated that knowledge of . - & Agency sources“and techniques was still being with- S held from the Warren Commission, and stated that on Saturday, February'l, 1964, the CIA was to present r a report on Oswald's Mexico City activities to the Warren Commission which would be in a form ¢ ; . L protective of the CIA's Mexico City Station's * sources and techniques (Ibid.) __. c i ; en i (Footnote cont'd from pg. 23.) a 1) Your Bureau not disseminate information re- ‘ ceived from this Agency without prior concugg , « . { rence oe : 2) In instances in which this Agency has provided information to your Bureau and you consider : that information is pertinent to the Commission's _ a ek interest, and/or comp] ments (sicT or otherwise C. ' is pertinent to information developed or received by your Bureau througa other sources and is being provided by you to the Commission, you refer the Commission to this Agency. In such cases it will be appreciated if you will | oa u advise us of such referral in order that we may ; . - ON 9 anti opie ne Pore oes fypture interest of the Hit Connisd SOS SRS 4E Miata carreth prasaratcry steps to meeting its needs. (Ibid. )acacn ; LE Lo Seintemdilassified by derivation: -