Honestly, I don't see any reason why he needs to do that. There is no reason to doubt his story, so far. It's not like he came up with this story to ask for donations or anything like that. He just want help to figure out what happened.

OP, I see that you reported the address to etherscan.io and posted a comment there. Be careful of those who replied to you pretending they can help you recover your lost money. They are scammers, do not trust them!