Approx three years ago I was a flight instructor who gave private pilot flight instruction, I was in the process of teaching a couple to fly when they approached me with a proposition of giving me a pickup truck to finish paying for their lessons, I agreed and they signed the title over to me and I lessened the truck in my name and drove it for approx three months. When it came time for them to get a faa flight physical they admitted to me that they both used controlled substances and could not pass the drug test, so naturally I could not continue to fly with them morally or legally . When I refused to continue to teach them they demanded their truck back, I advised them they could pay the cost for the lessons they had received and I would sign the truck back to them, but they refused, nothing else happened for several months and I eventually moved to another state. Before I left I again told them to pay me or the truck was still in my name . They had me charged with grand theft in Florida and there are warrants issued, where do I stand?