Sold a vehicle in Florida, buyer never transferred or registered the vehicle?

I sold a vehicle almost 5 years ago. It has been recently towed and placed in storage until auctioned. The person in which I sold the vehicle to, never transferred or registered the vehicle in his name.

I can’t find the Bill of Sale that I had. It has been a little bit of time since I sold the vehicle. I signed the title and dated it.

Other than an a reply to an e-mail that I sent the guy who bought, cause I didn’t have his phone number and had to go through a bunch of friends just to get his e-mail address, is there anything I can do to avoid the lien on my license.

In the e-mail reply back, he admitted that he bought the car, and over a year and a half ago and resold the car.

Would bringing him to small claims court, or going down to the police and showing them what I have currently be enough proof to get the responsibility of the car lifted from me and passed on to the proper party?

He says he has a bill of sale for when he sold the car, but he doesn’t seem to be to eager on faxing me a copy of it.

Shortly after selling the car, within a year, it had been marked as a code enforcement violation, he had claimed responsibility for the car then. Would that also be something to use as well?

Just trying to find the right and easiest course of action to take. Trying to avoid anything which is going to be costly on me, and avoid paying for tow/storage fees for the car which is going to be auctioned shortly.

Any help at all would be greatly appreciated.