Dyatlov Pass incident

After the case file was declassified, the evidence, including photos, was passed to the public domain.

An excerpt from the article 39 facts about Dyatlov Pass incident

Among the photos documenting the expedition of the Dyatlov group, there is one that invariably electrifies public opinion. It depicts an indistinct, formidable figure standing in the distance. The photo has provoked conspiracy theories about the existence of a Yeti monster in the Ural taiga. Proponents of the theory of a confrontation between tourists and intelligence agents point out that the figure could have been one of the agents, as a holster can allegedly be seen at his belt.

Researchers indicate that the photo most likely depicts Nikolai Thibeaux-Brignolle, who is said to have been a very energetic man who liked to fool around.