Please fellow Nairalanders, I am in a situation that requires a critical decision and I need your advice most especially if you are a lawyer.

I really wonder what he will be arresting you for. He cannot arrest you for damage to a property which he gave you permission to use. The police may want to charge you for malicious damage but it will be an effort in futility if you can prove that you were driving with reasonable care and under his authority. Try and get a lawyer handy just in case you are arrested so you will be bailed; and also if the matter is charged to court. The police should not go further with a bad case. They always know much. They may want to milk you after your initial arrest hence the need for you to get a lawyer in time to bail you out. The man will eventually drop any charges as he will be well adviced by teh police. good luck

^^
Sound advice.
Since he did not put any conditions on the loan of the vehicle, he has no terms to enforce in court. Since you did not attempt to abscond with the vehicle, there is no criminal case here. There is also no liability, as long as you both did not sign an agreement stipulating the terms for return of the vehicle.

From your statement here, it is clear for you to know the reason for your arrest. His car you collected from him had an accident and it is in police custody. Thank God that you didn't die.
The heart of men are desperately wicked. car to that person is a valuable thing to him and you don't know how long it took him to have that one. It will take God intervention for him to listen to you plea. I hate borrowing generally,most especially what i can't easily afford.
I can only wait for my turn. But seek the concern of especialised lawyer to help you.