Keith McCloskey, who has researched the incident for many years and has appeared in several TV documentaries on the subject, travelled to the Dyatlov Pass in 2015 with Yury Kuntsevich of the Dyatlov Foundation and a group. At the Dyatlov Pass he noted:
- There were wide discrepancies in distances quoted between the two possible locations of the snow shelter where Dubinina, Kolevatov, Zolotarev and Thibault-Brignolles were found. One location was approximately 80 to 100 metres from the pine tree where the bodies of Doroshenko and Krivonischenko were found and the other suggested location was so close to the tree that anyone in the snow shelter could have spoken to those at the tree without raising their voices to be heard. This second location also has a rock in the stream where Dubinina’s body was found and is the more likely location of the two. However, the second suggested location of the two has a topography that is closer to the photos taken at the time of the search in 1959.
- The location of the tent near the ridge was found to be too close to the spur of the ridge for any significant build-up of snow to cause an avalanche. Furthermore, the prevailing wind blowing over the ridge had the effect of blowing snow away from the edge of the ridge on the side where the tent was. This further reduced any build-up of snow to cause an avalanche. This aspect of the lack of snow on the top and near the top of the ridge was pointed out by Sergey Sogrin in 2010
McCloskey also noted:
- Lev Ivanov’s boss, Evgeny Okishev (Deputy Head of the Investigative Department of the Sverdlovsk Oblast Prosecution Office), was still alive in 2015 and had given an interview to former Kemerovo prosecutor Leonid Proshkin in which Okishev stated that he was arranging another trip to the Pass to fully investigate the strange deaths of the last four bodies when Deputy Prosecutor General Urakov arrived from Moscow and ordered the case shut down.
- Evgeny Okishev also stated in his interview with Leonid Proshkin that Klinov, head of the Sverdlovsk Prosecutor’s Office, was present at the first post mortems in the morgue and spent three days there. Something Okishev regarded as highly unusual and the only time, in his experience, it had happened.
Donnie Eichar, who investigated and made a documentary about the incident, evaluated several other theories that are deemed unlikely or have been discredited:
- They were attacked by Mansi or other local tribesmen.
- The local tribesmen were known to be peaceful and there was no track evidence of anyone approaching the tent.
- They were attacked and chased by animal wildlife.
- There were no animal tracks and the group would not have abandoned the relative security of the tent.
- High winds blew one member away, and the others attempted to rescue the person.
- A large experienced group would not have behaved like that, and winds strong enough to blow away people with such force would have also blown away the tent.
- An argument, possibly related to a romantic encounter that left some of them only partially clothed, led to a violent dispute.
About this, Eichar states that it is “highly implausible. By all indications, the group was largely harmonious and sexual tension was confined to platonic flirtation and crushes. There were no drugs present and the only alcohol was a small flask of medicinal alcohol, found intact at the scene. The group had even sworn off cigarettes for the expedition.” Furthermore, a fight could not have left the massive injuries that one body had suffered.