Monty, very good questions about the tongue,
Lets start at the labaz, The decision to leave so late in the day was no doubt met with some heated resistance from other members of the party. On the journey up the side of the mountain they are not making good time at all. The other members are even getting angrier, but no sense in shouting the wind will drowned them out.
After the accident at the tent the two Yuri's run ahead to start a fire. When they find how close they actually are to the forest they are now even angrier for Igor to even put them in harms way when they could of waited till first light.
When they finally are all together, fists are thrown directed at Igor for this putting everyone in this situation. In a matter of minuets the girls now screaming get the situation under control.
No one knows what training the medical examiner has in frozen body burning and pooling of blood. easily to see on a hot day in July but maybe not so much in a frozen thawed out body. False positive.
The tongue, The human body is 96% water, and when it has blood and oxygen pumping through it ,though still fragile, can endure a lot. When it is not functioning and is dead it starts to disintegrate.
Luda even though very strong woman, her tongue was very delicate, no match from pressure and continuous water flowing basically through her body now. The tongue is carved out neatly by the water and skin and eyes break down and get removed by the flowing water. Water and wind over century's have carved out the grand canyons and have smoothed out solid rock formations.
The examiner doing his best read the evidence correctly as he saw it but it was incorrect in many ways. A 2020 examination would contradict many of the original findings. Flesh and bone when soft and under pressure will easily break and disappear. The way all suffering the effects of hypothermia. On a normal winter day this would be easily survivable and would make for a good story around the campfires to come.