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Evidence Dossier

Legacy category: Unresolved

Dyatlov Pass Incident

Evidence Dossier: A record proves that a statement, transfer, examination, or result was documented. It does not automatically prove the anomalous interpretation attached to it.
Taxonomy note: Primary type is source collection; the archive also documents a single disappearance and death incident.
OverviewEvidenceTimelineAnalysisSourcesMedia Context
1959-02-01, 1959-02-02
Kholat Syakhl, Sverdlovsk Oblast, Soviet Union
8/10
5/10
Nine experienced Soviet hikers died after leaving a tent that was cut from the inside. The 1959 closing resolution attributed the deaths to an overwhelming force the hikers could not overcome but did not identify a physical mechanism.
High for scene, tent-cut, autopsy, and closure facts in the case file; medium for the slab-avalanche model; weak for attack, weapons-testing, or paranormal claims. Attached records are attributed English web translations, not certified translations or archive originals.

Investigative Assessments

"The reported claim remains worth testing against the record: Nine experienced Soviet hikers died after leaving a tent that was cut from the inside. The 1959 closing resolution attributed the deaths to an overwhelming force the hikers could not overcome but did not identify a physical mechanism. The strongest documented reasons to keep the file open are: Decision to Open the Criminal Case: Begins the contemporaneous investigative record; Criminalistic Examination of the Tent: Records three long cuts made from inside the tent. Key unresolved lead: What immediate event caused the group to leave the tent during the night?"
"Evidentiary limitations: High for scene, tent-cut, autopsy, and closure facts in the case file; medium for the slab-avalanche model; weak for attack, weapons-testing, or paranormal claims. Attached records are attributed English web translations, not certified translations or archive originals. Note that: Decision to Open the Criminal Case fails to support: Does not explain why the group left the tent; Criminalistic Examination of the Tent fails to support: Does not establish what prompted the cuts or exclude later disturbance. Documented contradiction: The tent examination reports cuts made from inside, but the attached records do not identify the event that prompted the evacuation. Leading conventional hypothesis: A delayed snow-slab release caused by the tent-platform cut, irregular terrain, and wind loading, followed by evacuation and hypothermia."

Case Summary

An evidence dossier on the 1959 deaths of nine Soviet hikers near Kholat Syakhl. It attaches translated central criminal-case records covering the opening decision, tent examination, two representative autopsies, radiation-testing order, and closing resolution, plus a peer-reviewed slab-avalanche model. It separates what the 1959 file recorded from what later models can plausibly explain.

Evidence Locker

7 inspectable evidence items. Claims and source findings are kept separate.

Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Decision to Open the Criminal Case

Analyst rating: High relevance to the original investigation; exact English wording is limited by uncertified web translation.

“The prosecutor opened a criminal investigation after discovery of the group and campsite.”
Record locationCase files 1. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsBegins the contemporaneous investigative record.
What it does not supportDoes not explain why the group left the tent.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Criminalistic Examination of the Tent

Analyst rating: High relevance to the original investigation; exact English wording is limited by uncertified web translation.

“Three damages approximately 32, 89, and 42 cm long were made with a sharp object; the report says the cuts were made from inside.”
Record locationCase files 303-304. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsRecords three long cuts made from inside the tent.
What it does not supportDoes not establish what prompted the cuts or exclude later disturbance.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Autopsy Report of Igor Dyatlov

Analyst rating: High relevance to the original investigation; exact English wording is limited by uncertified web translation.

“The forensic report records the examination used to determine Dyatlov’s cause of death.”
Record locationCase files 120-126. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsDocuments Dyatlov’s condition and cause-of-death findings.
What it does not supportDoes not reconstruct the precipitating event.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Autopsy Report of Lyudmila Dubinina

Analyst rating: High relevance to the original investigation; exact English wording is limited by uncertified web translation.

“The May 9, 1959 autopsy records extensive traumatic findings.”
Record locationCase files 355-357. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsDocuments severe chest injuries central to competing explanations.
What it does not supportDoes not identify the impact mechanism or prove homicide, avalanche, or blast.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Resolution for Radiation Testing

Analyst rating: High relevance to the original investigation; exact English wording is limited by uncertified web translation.

“The file orders radiation testing rather than assuming a radiological cause.”
Record locationCase files 370. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsDocuments that investigators ordered radiological testing.
What it does not supportDoes not establish dangerous exposure or connect contamination to the deaths.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Self-contained archival PDF with attributed English translation and full-resolution record scans Local copy hash-verified

Resolution to Close the Criminal Case

Analyst rating: High relevance to the original investigation. The unofficial English web translation contains apparent date, initials, and temperature-sign errors, so the appended Russian scans remain necessary for checking exact wording.

“On May 28, 1959, prosecutor Lev Ivanov closed the case after summarizing scene and autopsy findings.”
Record locationCase files 384-387. Local PDF begins with the attributed English translation and then appends each full-resolution source scan.
Evidence classTranslated primary investigative record
Relationship to claimDirectly documents the original investigation.
Authenticity assessmentHigh for represented record identity; moderate for exact translation wording.
What this supportsRecords the official 1959 conclusion and investigation boundary.
What it does not supportDoes not identify the physical mechanism behind the stated overwhelming force, and its unofficial translation should not be treated as a certified verbatim rendering.
ProvenanceUnderlying record attributed to the State Archive of Sverdlovsk Region. This local PDF preserves the DyatlovPass.com English translation page and appends the page’s full-resolution gallery scans.
Chain of custodyProsecutor file to state archive to foundation copy to DyatlovPass.com translation and scan gallery to self-contained hash-verified Casebook PDF. The English translation is not certified.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record
Peer-reviewed scientific journal article Local copy hash-verified

Mechanisms of slab avalanche release and impact in the Dyatlov Pass incident in 1959

Analyst rating: High authenticity, providing a physics-based model of a delayed slab avalanche triggered by a slope cut and katabatic wind loading.

“The challenge of explaining these observations has led us to a physical mechanism for a slab avalanche caused by progressive wind-blown snow accumulation on the slope above the hikers' tent. Here we show how a combination of irregular topography, a cut made in the slope to install the tent and the subsequent deposition of snow induced by strong katabatic winds contributed after a suitable time to the slab release, which caused severe non-fatal injuries, in agreement with the autopsy results.”
Record locationPage 1 (Abstract and Introduction) and Page 9 (Discussion and Conclusions).
Evidence classScientific analysis
Relationship to claimSupports the conventional slab avalanche hypothesis by resolving historical physical contradictions.
Authenticity assessmentPublished in a peer-reviewed scientific journal under Nature Portfolio; verified digital signatures and publisher watermarks.
What this supportsA delayed slab avalanche triggered by a slope cut could explain how the tent was collapsed hours after setup and why the hikers suffered high-force internal trauma without external impact signs.
What it does not supportDoes not definitively prove that an avalanche occurred, as no physical avalanche debris was recorded by the original 1959 search party.
ProvenancePublished in Nature Communications Earth & Environment on January 28, 2021.
Chain of custodyAuthors' manuscript to Nature editor to peer-review to final publisher PDF to open-access Nature distribution.
Source completenessNot yet assessed under the dossier content contract.
Open Document (Local PDF Document) Download Copy Canonical Agency Record

Documented Timeline

  • 1959-01-23: The Dyatlov group leaves Sverdlovsk for its Northern Urals route.
  • 1959-01-28: Yuri Yudin leaves the group because of illness, becoming the expedition’s sole surviving member.
  • 1959-02-01: The group pitches its tent on the eastern slope of height 1079, now commonly identified with Kholat Syakhl.
  • 1959-02-01 to 1959-02-02: During the night, the group leaves through cuts made from inside the tent and descends toward the forest in severe cold.
  • 1959-02-26: Searchers locate the abandoned tent on the slope.
  • 1959-02-27: In the standard chronology, searchers find Yuri Doroshenko and Yuri Krivonischenko near the cedar and Igor Dyatlov on the slope. The attached closing translation prints 26.II.59 for the fire and first two bodies, an apparent one-day source-translation discrepancy.
  • 1959-03-02: Searchers find Zinaida Kolmogorova on the slope.
  • 1959-03-05: Searchers find Rustem Slobodin on the slope.
  • 1959-05-04: Searchers find Lyudmila Dubinina, Semyon Zolotaryov, Aleksandr Kolevatov, and Nikolai Thibeaux-Brignolles in a ravine under deep snow.
  • 1959-05-28: Prosecutor Lev Ivanov closes the case, attributing the deaths to an overwhelming force the hikers could not overcome without identifying the mechanism.
  • 2020-07: A Russian prosecutorial review identifies an avalanche as the probable cause, as summarized in the attached 2021 scientific paper.
  • 2021-01-28: Johan Gaume and Alexander Puzrin publish a numerical model describing how a delayed snow slab could have released above the tent.

Named Participants and Roles

  • Igor Dyatlov and the eight other deceased hikers: expedition members whose campsite, tracks, belongings, and remains form the central physical record.
  • Yuri Yudin: Group member who left because of illness and later helped identify the expedition’s belongings and reconstruct the tent.
  • Vasily Tempalov: Ivdel prosecutor whose signed decision opened the criminal investigation.
  • Lev Ivanov: Prosecutor who directed major parts of the investigation, ordered additional examinations, and signed the closing resolution.
  • Genrietta Churkina: Criminalist who examined the tent and reported that the principal cuts were made from inside.
  • Boris Vozrozhdenny and Yuri Laptev: Forensic physicians named in the attached autopsy records.
  • Johan Gaume and Alexander Puzrin: Authors of the attached 2021 snow-slab model.

Contradictions and Record Conflicts

  • The tent examination reports cuts made from inside, but the attached records do not identify the event that prompted the evacuation.
  • The closing resolution records close, converging and separating footprints from poorly shod hikers, not evidence of an outside attacker; it does not determine whether the descent was calm, panicked, or forced by conditions.
  • Four hikers had chest or skull injuries according to the closing resolution, although it attributes only three deaths directly to traumatic injury, but the location and mechanism of those injuries remain disputed.
  • The 2021 slab-avalanche model addresses the shallow average slope, delayed release, and unusual injuries, but the original search record did not document an obvious large avalanche deposit at the tent.
  • Later summaries report traces of radioactivity on clothing, while the attached primary record is only the order for testing and does not include the complete laboratory result.
  • The unofficial closing-resolution translation contains apparent transcription or translation errors, including a missing minus sign in the temperature, May where January is contextually required, inconsistent initials for Yuri Yudin, and 26.II.59 for the first bodies where the standard chronology gives February 27.

Conventional Explanations

  • A delayed snow-slab release caused by the tent-platform cut, irregular terrain, and wind loading, followed by evacuation and hypothermia.
  • Evacuation because of a perceived snow or wind threat even if a large slab did not strike the tent.
  • Fatal exposure after the group became separated from shelter, with severe injuries caused either by snow impact or events in the ravine.

Evidence Stance Matrix

Not documented: No explicit evidence stance matrix has been reviewed.

Missing Evidence

  • Certified translations and direct state-archive custody copies of the attached 1959 records.
  • The complete autopsy set for all nine hikers; the dossier attaches two representative autopsies and the closing summary.
  • The complete radiological laboratory report and sample-level chain of custody; the dossier attaches only the order for testing.
  • Contemporaneous high-resolution scene and ravine photographs with complete custody and annotations.
  • Direct snowpack, wind, and weather measurements from the tent site during the night of February 1 to 2, 1959.

What Remains Unresolved

  • The immediate trigger for cutting and leaving the tent.
  • The timing and physical mechanism of the severe chest and skull injuries.
  • Whether a delayed snow slab occurred and, if so, its size and effect on the tent.
  • The source and significance of reported clothing radioactivity because the complete test result is not attached.
  • The exact wording of the 1959 records because the available English translations are attributed web translations rather than certified translations.

Investigative Hypotheses

  • A delayed slab avalanche caused by the tent-platform cut, local terrain, and wind-deposited snow, as modeled by Gaume and Puzrin.
  • A perceived snow or wind hazard prompted the evacuation, followed by fatal exposure after the group could not return to the tent.
  • The severe injuries occurred either during a snow-slab impact near the tent or later in the ravine; the attached records do not establish which mechanism occurred.

Open Questions

  • What immediate event caused the group to leave the tent during the night?
  • Did a delayed snow slab strike or threaten the tent, and what physical traces would have survived until the search?
  • When and where did the fatal chest and skull injuries occur?
  • What was the origin and evidentiary significance of the reported clothing radioactivity, given that the attached record is the testing order rather than the complete test result?

Archival Landing Pages and Evidence Corpus

Dyatlov Pass Historical Archive

Archival Landing Page

External URL: https://dyatlovpass.com

Mechanisms of slab avalanche release and impact in the Dyatlov Pass incident in 1959

Scientific Journal Article Local Source Verified

External URL: https://www.nature.com/articles/s43247-020-00081-8.pdf

Open Local Artifact (PDF Document) · Download Copy

Media Context

Editorial context only: These media listings document broadcasts, adaptations, documentaries, or cultural references. They do not constitute evidence, corroboration, or investigative testimony.

Devil's Pass (2013)

film fiction inspired by the case

A found-footage horror film using the Dyatlov Pass incident as its premise.

IMDb ID: tt1905040 · Verified 2026-08-05

Open IMDb Page

Dead Mountain (2020)

television series direct dramatization

A Russian dramatic series reconstructing the hikers' journey and the subsequent investigation.

IMDb ID: tt11455654 · Verified 2026-08-05

Open IMDb Page