Unknown, I parked the vehicle, got out of it, left car running for AC, locked the doors. The car was in park. Locks unlocked door, rear view camera display cut off, AC still running. I am viewing a house, so I walk around house and car still in park, 0-5min. I go in the house, 10-15 later, out of habit hit the lock buttons on car again, because I couldn't see it. When we exit the house the car is gone. Went in reverse and rolled across a road into a fence. When I arrived at the car, the doors were locked and the car was in reverse.