Okay, so maybe the alcohol thing may have been a red herring, but I still think I've found something fishy (no pun intended). In the recently posted nurse testimonies, they mention that a piece of their livers needed to be harvested be sent off "elsewhere" for analysis. Where this was and where this report is now, no one seems to know. Let's assume we'll never what happened to these analyses. We know that Vozrozhdenny was as unreliable and sloppy as they come, and he proudly asserts that no alcohol was found in the bodies, which shocks me. After doing some very basic research, it's actually incredible hard to determine whether or not a person was inebriated at the time of death, and even harder if the body has already begun decaying. There's a phenomenon of microbial fermentation after the death of a person, which eventually turns into the same molecule as alcohol and can easily be confused as such. Considering that at least four of the Dyatlov pass group's bodies were already at a stage of advanced decomposition, some
ethanol must have been found in their systems somehow. On top of this, there is no way whatsoever Vozrozhdenny could have come to the conclusion that the ravine four were found without alcohol in their system, especially considering most of them were found amongst melted snow in a small stream, meaning a higher chance of distillation of the ethanol that may have been present in the body.
I'm in no way an expert in the fields, so it's more than likely that I'm wrong, but I do recommend everyone interested to read the abstract of this publication to get some insight on the matter: https://www.ncbi.nlm.nih.gov/pubmed/16782292
TL;DR, I have no clue how Vozrozhdenny would have come to the conclusion that there was no alcohol whatsoever in the systems of the hikers considering all of the external factors present.