Perhaps the search team could post the co-ordinates in the area he went missing and the route taken by the boys on Friday. In conjunction with Google maps people could search for crevices and places where he could have gone missing, as as was done for the aviator Steve Fosset (see Wikipedia) Although in Fosset's case it was not a success, and was even a hindrance, I believe if its setup in the right way it could be helpful. Even more helpful is using military satellite data that was taken on the day and a few days later - if it exists and is available. Perhaps he could be located in the satellite pics and it could shed some light on what happened to him.

I my opinion there are any number of possibilities that could have happened and its essential to keep an open mind to all possibilities - we have not really heard any theories from law enforcement.

Probably the best thing we can do is daven for him, and his family and all of Klal Yisroel