Of course he is going to say he cant sign the Bill of Sale, because there are impound fees he would have to pay if he did! I have no idea what was going through your head when you decided to hand someone a car and the title with no BOS, or why your friend didnt make you sign a BOS, but that shits retarded.
Good luck getting this figured out, I have a feeling unless you can get the title back your friend is sol.
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"The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will."
Vincent T. Lombardi