I've been following Austin's case and found this website and now I've been following the thread here for the last week. I found several potential clues in the high resolution images on Flickr. One thing is clear - he is not appearing on any photos on the mountain itself. Taking everything under account, I am working under the hypothesis that he is somewhere in the tree / forested area and that he made it down the mountain, although cold, wet and super scared and in the dark, and he couldn't find his way back to his original camp. This would explain why he sumitted, but afterwards didn't make a distress call on the mountain, but also didn't make it back to camp. Because of this, I think he walked unsuccessfully in the wrong direction, leaving himself exposed in the freezing rain over night, without his camp gear, tent or heating equipment. Because he got lost and walked way off track, he might have even encountered some wild animals which forced him to run either further out or animals which went for his food pack and he had to abandon it. At that point, I think he was totally lost, cold, still wet and out of energy and food and maybe just passed out at some point. Because he is so physically fit, it's hard to imagine that he could not still manage to find his way back to his original camp. Also, the weather in the daytime search photos looks much drier/warmer than on the night he had summited. So it seems like the worse was behind him at that point. Therefore, I think after not being able to find his original camp after 1 day or so, he gave up and tried to walk all the way back to the lake pick-up on his own without any of his resources rather than continue unsuccessfully to search for his original camp. Self-preservation suggests that you would try to get as soon as possible and as directly as possible back to help. I think he is somewhere in between the base of the mountain and what he "perceived" as going back towards the lake. Perception is the key word because what he perceived could also be completely in the wrong direction again, hence why we still have not found him.