It's possible (maybe even likely) a key piece of evidence as to what happened is missing. And also, given what's known so far, that piece of evidence has not b

It's possible (maybe even likely) a key piece of evidence as to what happened is missing. And also, given what's known so far, that piece of evidence has not been found and thus remains unknown to anyone but the hikers. I wonder if any of the 9, before perishing, had tried to leave a clue as to what happened at the tent.