Yes, you can take him to court for the damage he caused to your vehicle. In Colorado, when someone borrows your car and causes an accident due to their own negligence, they can be held personally liable for the resulting damages—even if they are not the legal owner of the vehicle. The witnesses and his statements regarding paying you back are strong evidence of his negligence in the case. For more, you can visit our civil litigation page. Contact us here to speak with one of our civil litigation attorneys.