Socorro 1964
On the afternoon of 24 April 1964, at approximately 17:45 local time, Socorro Police Officer Lonnie Zamora broke off pursuit of a speeding vehicle south of the city when he observed a flash of flame and a roaring sound in an arroyo half a mile to his west. Driving toward the source, Zamora saw what he initially took to be an overturned car standing on edge — then realised it was a smooth, egg-shaped metallic object on four landing legs, with two human-figure standing beside it in "white coveralls". The object lifted off with a loud roar, departed at high speed, and left four landing-gear depressions, a charred bush, and an unidentified residue on the soil. Project Blue Book opened case 8766; the file is held at NARA in Record Group 341. The case remained classified "Unidentified" at Blue Book's closure in 1969 and is the most-cited single-witness daylight close-encounter case in the BB corpus.
The investigators
Initial USAF investigation was led by Capt. Richard Holder (Stallion Range, White Sands) followed by Capt. Hector Quintanilla (Blue Book HQ) and Blue Book civilian scientific consultant Dr. J. Allen Hynek (Ohio State University). Hynek arrived at Socorro on 28 April 1964, four days after the event. He interviewed Zamora three times; he interviewed the local FBI agent who had inspected the site that evening; he measured and photographed the landing-gear depressions and the charred brush. Hynek's report to Quintanilla concluded that Zamora was "a serious officer who is a pillar of the church and who is well known and well thought of in his community… [the case] has none of the earmarks of a hoax."
Verbatim — Quintanilla's later reflection
"The Lonnie Zamora case is the most baffling case I encountered in the seven years I spent on Project Blue Book… Zamora was a sober, reliable, and well-respected police officer. We never found any explanation for what he saw, and to this day I have no explanation for it."
— Maj. Hector Quintanilla, in his unpublished memoir UFOs: An Air Force Dilemma (manuscript held by NARA + Smithsonian), 1975.
Why it remains the gold standard
Three properties make Socorro the gold standard for single-witness close-encounter cases. (1) Zamora was a sworn law-enforcement officer on duty, with no UAP-related interests or prior interest in the subject. (2) Physical traces (four landing-gear depressions in a square pattern, scorched ground, scorched brush, unidentified soil residue) were independently photographed and measured within hours by FBI Agent J. Arthur Byrnes + USAF investigators. (3) The case was never formally explained by the U.S. Air Force; Blue Book closed it as "Unidentified", and that classification persisted through the Condon Committee (1969) and the GAO records search (1995). Hynek subsequently used Socorro as the type-specimen for what he called "close encounter of the third kind".
The voice on the tape
Timeline
Patrolman Zamora breaks off vehicle pursuit upon hearing a roar + seeing flame in an arroyo south of Socorro.
Approaches arroyo. Observes egg-shaped object on four legs with two figures beside it. Object lifts off, departs.
Zamora radios Socorro PD dispatcher Nep Lopez. Sgt. Sam Chavez arrives at scene.
FBI Special Agent J. Arthur Byrnes (Albuquerque office) arrives. Documents site.
Capt. Richard Holder (Stallion Range / White Sands) opens USAF investigation. Photographs ground depressions + scorched brush.
Dr. J. Allen Hynek arrives in Socorro; conducts three interviews with Zamora over 48 hours.
Project Blue Book HQ (Capt. Quintanilla) compiles case 8766. Classification: Unidentified.
Blue Book closes. Socorro retains 'Unidentified' classification in NARA RG 341.
Hynek publishes 'The UFO Experience'; Socorro is the type-specimen for 'close encounter of the third kind'.
GAO records-search reaffirms NARA holdings for case 8766.
Linked evidence in this archive
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Project Blue Book Case 8766 — Socorro / Zamora
Complete case file: Zamora statement, FBI Byrnes inspection notes, Holder/Quintanilla USAF reports, Hynek interview transcripts, ground photographs, soil sample analysis.
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Hynek's three Zamora interviews — 28–30 April 1964
Verbatim transcripts of J. Allen Hynek's interviews with Lonnie Zamora. Hynek concludes Zamora is 'a serious officer… none of the earmarks of a hoax.'
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FBI SA Byrnes site inspection — 24 April 1964
FBI Albuquerque field office contemporaneous inspection notes. Independent of USAF Blue Book investigation; preserved in NARA via FBI cross-deposit.
Why this case still matters
Socorro is the case that produced the 'close encounter of the third kind' classification — Dr. Hynek's six-tier UAP taxonomy is anchored in this single event. Of all 12,618 Project Blue Book cases held at NARA in RG 341, Socorro is the most-cited example of a daylight, single-witness, physical-trace close encounter where the witness's credibility and the trace evidence both passed independent investigation by FBI + USAF.
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