I tried purchasing a car out of state. I flew to Chicago from NY with 2 checks, 1 for the sellers bank & 1 for the seller as the balance. We both signed the bill of sale. The seller did not deposit the check correctly and now 3 weeks later is requesting another check from my bank. My bank canceled the 2 checks because they felt it was fraudulent. I never received a title. Now i am telling the seller to come get his car and he refuses. I am going to put his car in the inpound until he decides to pick it up. He is now threatining to sue me. Not sure what he can sue me for. Who is ultimately responsible?