Please make some more efforts in investigation and find out that there are 2 addresses which used to deposit funds in the account and the ownership claimed by him. Don't be lazy. 
Oh, this is correct transaction http://gastracker.io/tx/0x557e18b23b6f955ea515494119966bd5bd07313702927eb1be9dd2a2a36fb11f , my mistake.Even after withdrawal of funds (In account which is claimed by him as owner), the scammer keep on crying, why ?
As per his details provided for ownership, first time he stated that he can not give IP because he was using VPN, Second time he stated that he was accessing account from a cyber cafe and third time he even provided IP address too. You think this is believable ??
If we are talking about site whose owner rigged result to cheat player in EV+ game, I think everything is possible. Funds have been returned after this accusation, or? I will believe it if/when I see signed message from deposit address. As per his details provided for ownership, first time he stated that he can not give IP because he was using VPN, Second time he stated that he was accessing account from a cyber cafe and third time he even provided IP address too. You think this is believable ??