What the hell you need a lawyer for? Since his IP is in Kansas, any one of you US citizens should be able to complain directly to police, and let them do the leg work. Bit trickier for us Brit's though.
Good work Sherlock... BUT... anyone can buy Kansas VPS and run VPN on it. So he can live in Russia, China, Brasil or any other country.
Anyway, as I have 50k coins on this pool (I know, I should change to other pool earlier, but it was Christmas time, so everything was different) so I still hope this is not a scam...