Fox is reporting al Harbi shocked the Saudis when he asked to turn himself in. He is sick they are saying .....and is in a hospital tonight.
That might be more than a hint as to motive for turning himself in.
I saw some report on local CBS news, not sure if its on FR, that the CIA believe Ben Laden is living as part of a "regular" family in Pakistan - totally our of sight and out of contact with any of the current AQ hierarchy.