The Hill the campsite is on has never had any history of avalanche.
They moved 2000 meters then moved apart bodies found in three separate locations
Wikipedia (reliable I know) lists a few different theories, it says that avalanches were common where theY camped.
Interesting story though, I'd never heard of it and I usually like these sort of mysteries.
I've looked at this from several different angles, but on this occasion I don't think JB was responsible. :D
Must have been the Yeti then.