Sorry Kathleen D. Smith.
What I think is being said regarding the caption above the photo that says "unknown body " is only relevant to the Dyatlov website of that picture..
A lot of the photos have a caption or description of what we see , the author of this website, teddy , and those that helped have given a description of what these photos show, any comments linked to the photo are later research. My understanding is that when it says "unknown body" it just means it is unknown which body of the group it was because it can't be identified from other pictures of the deceased.
It is one of the 9 tourists, we just don't know which one . The captions belongs to the website not the case files. To help us understand what we are seeing , to the best of the the authors of the website have written a head liner of the photos. I hope that helps?