Searching the archive...

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.

Navigate

Home Search Entities Topics Timeline Evidence

Analysis

Open Questions Tension map Established Facts Release history Bibliography

About

Overview Methodology Editorial policy Roadmap

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.

Search · JFK Research Center

Documents Mentions Semantic3 results

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

Filters

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

1950 – 2004

19502004

Document matches | 3

Results for LEONOV, NIKOLAY SERGEYEVICH.

Results3Current document, mention, or semantic mode Entities32People, agencies, places, and concepts Topics11Curated subject lanes TimelineChronology routes for this query QuestionsOpen-question routes

Visible OCR

2/3

High confidence

Top agencies

CIA 3

Dense years

1964 1

CIA|September 21, 1964|PAPER - TEXTUAL DOCUMENT|NAID 104-10218-10021

SourceCIATextMetadata onlyRecordNAID 104-10218-10021

DOCUMENT TRANSFER AND CROSS REFERENCE ON LEONOV, NIKOLAY SERGEYEVICH.

CIA · JFK64-53 : F13 : 20040315-1058125 : · Release: Redact

Matched by

Title, metadata, or description text

Record type

CIA / PAPER - TEXTUAL DOCUMENT

Confidence

Entity name appears in the title

High confidenceCurated metadataCIAPaper - Textual DocumentRelease 2022

CIA|PAPER - TEXTUAL DOCUMENT|NAID 104-10218-10007

SourceCIATextOCR availableRecordNAID 104-10218-10007

LEONOV, NIKOLAY SERGEYEVICH.

CIA · JFK64-53 : F15 : 1998.04.27.14:31:04:483082 : NOT BELIEVED RELEVANT (NBR) · Release: Redact

Matched by

Title, metadata, or description text

OCR status

Full text is available for close reading

Record type

CIA / PAPER - TEXTUAL DOCUMENT

High confidenceOCR textOCRCIAPaper - Textual DocumentRelease 2025

CIA|PAPER - TEXTUAL DOCUMENT|NAID 104-10218-10008

SourceCIATextOCR availableRecordNAID 104-10218-10008

LEONOV, NIKOLAY SERGEYEVICH.

CIA · JFK64-53 : F16 : 1998.04.27.14:36:33:060082 : NOT BELIEVED RELEVANT (NBR) · Release: Redact

Matched by

Title, metadata, or description text

OCR status

Full text is available for close reading

Record type

CIA / PAPER - TEXTUAL DOCUMENT

High confidenceOCR textOCRCIAPaper - Textual DocumentRelease 2025