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1974 · Near Coyame, Chihuahua, Mexico; staging at Fort Bliss, Texas

Coyame, Chihuahua, 1974: the Deneb report crash

Lead
Strength D · 3/10
Evidence 1/4 · Witnesses 1/3 · Backing 1/3

One anonymous document of unknown provenance with exact military detail, a named researcher who heard of it before it surfaced, a 1974 newspaper death notice for a crashed pilot, and a named border witness who came forward in 2012.

Plausibility Moderate
Score 9 · 8 factors for, 1 against

An anonymous but detailed and restrained report that Stringfield heard of years before it surfaced, a CIA warning, a crashed pilot on record and later border witnesses; it rests on one document, and no released record contradicts it.

See the factors ↓

Unconfirmed
Part ofThe cover layer, The legacy program, The recovery teams
A circular craft beside the wreck of a light plane in the desert near Coyame, with US helicopters arriving, as the Deneb report and Presidio witnesses describe it (August 1974). · Illustration for uaptrail.com
  • The document: the anonymous 1992 Deneb report, with exact radar, team and disc details.
  • Support: Stringfield's earlier hearing and his 1978 CIA warning, a crashed pilot in the 1974 press, Chambers's helicopters.
  • Gerb's view: a rapid-response recovery like Kecksburg, routed toward Atlanta.
When25-27 August 1974
WhereNear Coyame, Chihuahua, Mexico; staging at Fort Bliss, Texas

On 25 August 1974, according to an anonymous 1992 document known as the Deneb report, US air-defence radar tracked an unknown object from the Gulf of Mexico into Chihuahua, where it vanished near Coyame at the same time and place as a light plane went down. Mexican searchers found the plane and a circular craft; a US recovery team staged at Fort Bliss crossed the border, found the Mexican convoy dead and flew the 16-ft disc out. Leonard Stringfield had heard of the case before the report surfaced and says the CIA warned him off Mexico in 1978. A pilot's death in a plane crash that week is in the press of the time.

How plausible · Moderate

An anonymous but detailed and restrained report that Stringfield heard of years before it surfaced, a CIA warning, a crashed pilot on record and later border witnesses; it rests on one document, and no released record contradicts it.

  • ●●
    Restraint Stringfield: it separates hard evidence from speculation.
  • ●●
    Fits secrecy practice A covert cross-border operation, a 1978 CIA warning and no records found.
  • ●○
    Access The report claims two eyewitnesses and copied documents; the author is unknown.
  • ●○
    No gain sought Circulated anonymously; nothing sold.
  • ●○
    Consistent over time The same account since 1992, and known to Stringfield before then.
  • ●○
    Independent convergence Chambers's returning helicopters and Stringfield's earlier hearing.
Against
  • −
    Lone source, no corroboration The core rests on one anonymous document.

Plausibility weighs how well an account fits where secrecy hides the documents by design, so missing records never count against it. Strength measures what is documented. Assessed 2026-10-24.

On the record

  • El Fronterizo reports pilot Enrique Rivera Gutiérrez's death from plane-crash injuries on 30 August 1974.
  • CIA FOIA F-2007-00637 found no records, which fits a covert operation.

Claims

US radar tracked an unknown from the Gulf of Mexico to near Coyame on 25 August 1974; a light plane went down at the same spot, Mexican searchers found it and a circular craft, and a US team from Fort Bliss crossed at Candelaria, found the Mexican convoy dead and flew the disc out.The Deneb report on Coyame (23 March 1992)anonymousLeadDeneb report (1992)
'The US military team had covertly crossed into Mexico to retrieve the object'; the report is 'authoritatively written using correct military terminology'.The 1974 Coyame, Mexico UFO CrashanalysisSourced, unconfirmedLeonard Stringfield (1994)
He had heard of the case by the late 1970s or early 1980s and was warned 'circuitously' by the CIA in 1978 not to discuss Mexico.The 1974 Coyame, Mexico UFO CrashfirsthandSourced, unconfirmedLeonard Stringfield
Pilot Enrique Rivera Gutiérrez died on 30 August 1974 of plane-crash injuries.firsthandSourced, unconfirmedEl Fronterizo (1974), via Noe Torres and Ruben Uriarte
She and her son in Presidio, Texas, saw a fireball and explosion over Mexico, then military helicopters, one twin-rotor, fly back into the US within a day.The 1974 Coyame, Mexico UFO CrashfirsthandSourced, unconfirmedJohnnie Chambers (2012)
A CIA FOIA search on an 'alleged mid-air collision near Coyame' found no records.The 1974 Coyame, Mexico UFO CrashfirsthandOn the recordCIA FOIA F-2007-00637

Similar cases · sharing people, threads, topics or era

Herrera encounter 2009Remote viewing begins 1972The crashed egg in Peru (Weygandt, 1997) 1997Lockheed's 12 craft 2009

Connected cases

Blue on blue 2004 2004Kecksburg, Pennsylvania: the fireball and the woods search 1965

People and organizations

Central Intelligence Agency orgJoint Special Operations Command (JSOC) orgMichael Herrera personThe Deneb report on Coyame (23 March 1992) document

Sources

Mentioned on (6)

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