Hi Osi
I can only guess by reading the case files and trying logic, I might not be correct.
We don't know if the photo of the DP9 digging the trench for the tent is true but there is little reason to doubt it as authentic. It's been in the public domain for many years and no other hikers came forward to say it was from their hike , the photo is in the case files and there would be little reason to fake it . There seems to be no deliberate lies in the case files, just a little confusion it the retelling of events .
I'm not sure why we don't have a 90cm trench in the photo when it's discovered, this may have been eroded by the wind over 3 weeks.
The lumps of snow are from the searchers digging around the tent , the possible reason for them digging around the tent comes from the statements and what was believed may have happened . It was first thought one of the hikers went to the toilet and was blown down the slope , then the others chased to help but the wind was too strong for them to return. We must remember when the photo with the searchers was taken. It was taken after the first 4 bodies were found and there was no autopsy /ravine 4 or any other information. All they knew was that Dyatlov and zina had been found buried on the slope , so I would guess they started digging around and below the tent for that reason.
Also, I believe one of the early searchers said they had dug up around the tent and taken skis( I believe these were for the sappers ) and items out of the tent before the official investigation/ inventory had taken place , this is perhaps why we get different reports about what was in the tent and lying about. It was all a bit clumsy and we have to accept there was a lot going on the 26th and 27th of February. That's , several search parties in the forest and other mountain tops, the lead investigators trying to land, sappers , dog handlers,being called in and instructions to find a campsite for the searchers tents and make a landing zone for a helicopter in the forest. Radios, stoves , food all had to be dropped off and transported to a suitable site . On the same day the two Yuri's were found , then Dyatlov and then Zina , everyone was running about with very limited resources and trying to help.
I guess very few protocols were followed, no one was given instruction what to do or not do, radiograms would take time , digging up the bodies and collecting the bodies to boot rock , bagging them etc. A busy and stressful day for all.