It might help to list his INTERESTS .. so if he is one of those " Amnesia" tourists walking around, dazed and confused ,
someone can strike up a conversation up with him.. He may not remember is own name but he will still be able to discuss his interests. Also a PROFILE (side view) picture might help.. sometimes thats all you get to see when you walk past someone..
Last guy that was lost , they found him A ok.. but wandering in a complete daze.. and he was spotted how many times, like ghalf a dozen ?
.. the DR seems to be the place where this happens to people more than other places..So chances are probably very good that he is OK..
Hope he turns up safe and Sound, pronto....
B