Automatic Transmission problems of the 2012 Toyota Prius

The contact owns a 2012 Toyota Prius. The contact stated that after the vehicle was parked in a residential garage, it started to roll away in reverse independently. The contact stated that the vehicle rolled all the way into the street knocking her down to the ground and into a mail box. The contact sustained a laceration to her left leg which required medical attention. The dealer was not notified of the failure. The vehicle was repaired. The approximate failure mileage was 23,900.