NHTSA is investigating the 12th incident involving "Autopilot" and a car crash, this time the car backended a police car on the side of the road while the driver was turned around checking on his dog. Fortunately no serious injuries.
https://video.foxbusiness.com/v/6116186321001/
(can't believe this thread was 3 years ago, but I didn't want to start a new one, all comments above still apply).