Investigators found a laptop computer in the Tesla Model S sedan involved in a fatal crash on May 7, the Florida Highway Patrol said on Thursday.
Neither the computer nor a DVD player also found in the vehicle was running after the crash, according to Sergeant Kim Montes, who said investigators could not determine whether the driver of the Tesla was operating either at the time of the crash.
Joshua Brown, 40, of Canton, Ohio, was the lone occupant of the Tesla and was killed in a collision with a truck near Williston. Witnesses who came upon the crash wreckage gave differing accounts last week about whether the DVD player was showing a movie.
Sergeant Montes said the 2015 Model S was equipped with a computer stand, but the laptop was not mounted on the stand when investigators recovered the computer after the crash.
Tesla has said the car's semi-automated Autopilot system was turned on at the time of the crash.
The National Highway Traffic Safety Administration is investigating the accident to determine if autonomous driving features played a role in the crash.
The accident has created a new level of scrutiny over self-driving technology. The Tesla accident has opened debate about whether drivers were being lulled into a false sense of security by such technology.
It could be weeks if not months 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 Tesla 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.
The automaker said in a statement last week that the system "does not turn a Tesla into an autonomous vehicle and does not allow the driver to abdicate responsibility."