He should --
The General has had six weeks to come up with any evidence for his claim that it is in Pakistan. Where is that evidence???
Surely his sources have cellphones -- where are the photos???
He doesn’t have to prove it. He gave his opinion just as others have, so far, he hasn’t been proven any more wrong or misguided than those that got the big woody over the silly pings and oil slicks than were fruitless. At least a bunch of money wasn’t spent chasing follies.