Toyota threating with repossession of my leased vehicle after the accident.

I leased a car from Toyota. My lease expired now, but they gave me a 6-months extension (which did not expire yet). Approximately a month ago I got in a car accident and incurred about $7,000 of damages, which were covered in full by my insurance. Now, Toyota wants to repossess my car and telling me that if I will not disclose the location of the vehicle (it's still in a shop) it is a criminal offense. I am confused. I have a contract with them, so how can they threat me with the criminal offense for not giving back the car? I am in Cook County, IL