Both the send and receive address match and verify. He has a stronger claim them the other. I recommend you add him to the claim list and re allocate payout.
If you want to be totally transparent about this you should probably only pay out (varified) addresses send to a proven Kruniac address.
The others that send from Gox or Local bitcoin address (while probably verified) could be judgment call as how do you verify the screen shots were not tampered with.
I'll leave that up to you and John.
I, too, am willing to provide credentials to a trusted party to verify the address provided by Kruniac and his confirmation of the payment and/or the payment itself.
There was no tampering with the screenshots.