The contact owns a 2016 Ram 2500. The contact stated that the vehicle was previously repaired under NHTSA Campaign Number: 17V821000 (Power Train). The contact stated that while the vehicle was turned off with the key out of the ignition, the vehicle rolled backward and crashed into some trees. Additionally, the contact was able to move the gear shifter while the vehicle was turned off. The contact's son was inside the vehicle when the failure occurred; however, no injuries were sustained. No Police report was filed. The vehicle was taken to the dealer, and the contact was informed that the recall repair failed prevent the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 30,000.