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“As to the video, there was a witness who came to the scene immediately after the accident occurred, and we can’t verify it at this point,” said Paul

Weekley of Tampa, the lawyer for the truck driver. “But what we have been told is that he saw a Harry Potter video still playing when he got to the scene.”

The question of whether the driver of the 2015 Model S was not watching the road is critical for Tesla Motors Inc. The electric car maker is facing a preliminary inquiry by federal regulators over the safety of the Model S Autopilot system that was engaged at the time of the crash.

The Autopilot system allows the car to keep itself in a lane, maintain speed and operate for a limited time without a driver doing the steering.

Tesla said in a statement Friday, “Autopilot is by far the most advanced driver assistance system on the road, but it does not turn a Tesla into an autonomous vehicle and does not allow the driver to abdicate responsibility.”

It could be weeks before officials make a final determination of the cause of the crash, the first known fatality of a Model S driver while using Autopilot.

The FHP’s Sergeant Montes said a Tesla engineer downloaded the information from the “black box” and shared it with FHP investigators.

The FHP has the ability to download information from newer vehicles about how the vehicle was being driven before a crash. But it does not have the ability to download information from Tesla’s data system, Montes said.