Unnamed exchange has been closed for quite some time, what are your chances of bringing a successful case against him? If memory serves correct, Tillkoeln is German, did you file the police complaint in the country he lives in or some sort of EU wide complaint?
I filed a police report and, as far as I know, the investigation is still ongoing.
I filed it in Belgium, but I included proof that he's behind it. Belgian police can just work with their German colleagues for this.
Unnamed Exchange being closed is irrelevant.