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JFK Research Center

A research reading room for records related to the assassination of President John F. Kennedy, drawn from the U.S. National Archives Catalog.

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Records sourced from the U.S. National Archives Catalog, ABBYY JFK-OCR, and allowlisted primary-source reports. Transcriptions and OCR are machine-generated and may contain errors.

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Scope: This research tool indexes 37,141 records - a curated subset of the ~300,000 documents in the JFK Assassination Records Collection. Releases indexed: 2017-2018, 2021, 2022, 2023, 2025. 2,165 records have full-text OCR indexed - of those, 2,162 are sourced from the 2025 re-release (NARA has not yet published an XLSX manifest for 2025; each document’s prior-release history is shown on its page). Releases not yet indexed: 2026. Methodology

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FBI18,005CIA15,955HSCA1,226Department of Defense315NSA299SSCIA258Senate (Church Committee)253Senate236Department of State79NARA47JCS45U.S. Marine Corps45Department of Justice33U.S. Secret Service32ROCKCOM24WC24ARMY24DOS17LBJ14KISS/SCOW11MATHENY7INSCOM6OSD4BUCHEN/DAN4DUVAL78-673CAR/HARDY3BUCHEN78662DAVIS2CHENEY2

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Results for SSCI TRANSCRIPT, TESTIMONY OF DCI WILLIAM COLBY

Results1Current document, mention, or semantic mode Entities32People, agencies, places, and concepts Topics11Curated subject lanes TimelineChronology routes for this query QuestionsOpen-question routes

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1975 1

Senate|May 21, 1975|PAPER, TEXTUAL DOCUMENT|NAID 157-10011-10024

SourceSenateTextOCR availableRecordNAID 157-10011-10024

SSCI TRANSCRIPT, TESTIMONY OF DCI WILLIAM COLBY

… ECORD SERIES : TRANSCRIPT AGENCY FILE NUMBER: Document Information ORIGINATOR : SSCIA FROM: COLBY, WILLIAM E. TO: TITLE: SSCI TRANSCRIPT, TESTIMONY OF DCI WILLIAM COLBY DATE : 05/21/1975 PAGES: 113 ■ - SUBJECTS : CASTRO SSCI TRANSCRIPT, TESTIMONY OF DCI WILLIAM COLBY OPERATION MONGOOSE CU …

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Senate / PAPER, TEXTUAL DOCUMENT

High confidenceOCR textOCRSenatePaper, Textual DocumentRelease 2025