Based on the evidence provided, it does look like the two accounts match. However, that fact is somewhat irrelevant with respect to what I can do at this point in time. The accuser could not provide ample evidence that the account was his at some point, or that it was in fact "hacked", so there's nothing I can really do about it. Based on my conversation with him and what evidence was provided, I am more lenient to believing him, but without the proof of the actual hacking part of the story, he could just be another random scammer.

Anyway, sold, so closing this.