Either way, the only person trying to hide their identity is copthis, a profile made to defame a member who isn't hiding at all and is responding to your allegations. If you had some issue with him do it without hiding behind a fake account and I will have more chance of believing you. There is nothing any of us can do to help you, if you got nowhere with the cops you are out of luck I guess.
Sorry to anyone buying faulty S/H parts, or getting 'ripped' I have been burned many times myself over the years, that's the chance you take not buying new from reputable sellers/shops.