(police said he had apparently been sleeping in the Nemours building on the night of the 29th)
“Wheeler apparently spent time Thursday sleeping in the Nemours building before he was last seen alive “ http://liveshots.blogs.foxnews.com/2011/01/06/wheeler-super-bloodshot-eyes/
His eyes were the most bloodshot I have ever seen,” he told Fox News, saying that it appeared he had been wearing the same clothes for a long time, because the cuffs on his white shirt were filthy. But the clerk said when Wheeler started to talk, he appeared to interact normally and was mentally aware, ordering a cup of coffee. He told us he did not appear to be confused and disoriented as others have said, and that he sold him coffee at about 8 a.m. on the morning of Thursday, December 30th.
The fact that the next morning he did not appear "to be confused or disoriented" would IMO negated the stress possibility. He recovered in just a few hours, which can actually happen in just a few minutes if the sugar level is adjusted.