treatment as he suffered from epilepsy. he left hawaii for hong kong on may 20th. it appears no one was the wiser about snowden's abrupt departure. last wednesday, police came to his home to check on his welfare, as he had not reported back to work. they found an empty house cleaned and prepped for sale. last wednesday, putting it on the market, police show up. tell me about that? >> well, they just came to the door and they asked if i knew where the former tenant was, and that he was missing from work and he had a medical condition, and that was all. it just seemed like a missing persons type of a thing. >> reporter: the following day thursday, london's "guardian" newspaper leaks the news, but it wasn't until snowden declared himself the source of the documents that anyone knew what he was up to. now, there is one small inconsistency with what snowden