His incredibly tactfully minded as you know, and the embassy is being watched very closely by the public. I doubt that he had/has not organized external surveillance on the embassy itself. I don't see anyone being able to raid that place without it being recorded.

It's a very unpredictable political/business climate, perhaps he is awaiting for the change of players in the US judicial structure - DOJ and AG, before popping his head up. Highly unlikely, but he may have sneaked out of the embassy himself - and utilizing the suspicion as his own protective cover.

I think one way or another, we will have our answer soon.