Same like others you may haven’t checked his trust page before making the deal with him. Its a alt account and negative trust is visible on his account. Few days earlier i tagged him but our tagging will make no difference if you guys don't feel it necessary to check why a user's is bearing  red paint on his profile.

I will suggest you to move your thread to " Scam Accusation" and follow the proper scam report format to make your accusation much stronger. Please don't forget to add all the evidences that you have in your hand.