LOS ANGELES (AP) — The driver of a Tesla involved in a fatal crash that California highway authorities said may have been operating on Autopilot posted social media videos of himself riding in the vehicle without his hands on the wheel or foot on the pedal.

The May 5 crash in Fontana, a city 50 miles east of Los Angeles, is also under investigation by the National Highway Traffic Safety Administration. The probe is the 29th case involving a Tesla that the federal agency has probed.

In the Fontana crash, a 35-year-old man identified as Steven Michael Hendrickson was killed when his Tesla Model 3 struck an overturned semi on a freeway about 2:30 a.m.

Hendrickson was member of the Southern California chapter of a Tesla club who posted numerous photos and video on social media of his white Model 3. One video on his Instagram account showed him riding in the driver’s seat without his hands on the wheel or foot on the pedal as the Tesla navigated freeway traffic. The video included the comment: “Best carpool buddy possible even takes the boring traffic for me.”

A GoFundMe page set up to raise money for his funeral and memorial service says Hendrickson was survived by his wife and two children. A message seeking comment from his wife has not been returned.

“Every time we spoke to him, he would light up talking about his kids and loved his Tesla,” Tesla Club-SoCal posted on Instagram. “He was truly an amazing human being and will be missed!

Another man was seriously injured when the electric vehicle hit him as he was helping the semi’s driver out of the wreck.

The CHP announced Thursday that its preliminary investigation had determined that the Tesla’s partially automated driving system called Autopilot “was engaged” prior to the crash. The agency said it was commenting on the Fontana crash because of the “high level of interest” about Tesla crashes and because it was “an opportunity to remind the public that driving is a complex task that requires a driver’s full attention.”

However on Friday, the agency walked back its previous declaration.

“To clarify,” a new CHP statement said, “There has not been a final determination made as to what driving mode the Tesla was in or if it was a contributing factor to the crash.”

At least three people have died in previous U.S. crashes involving Autopilot, which can keep a car centered in its lane and a safe distance behind vehicles in front of it. Tesla is allowing a limited number of owners to test its self-driving system.

Tesla, which has disbanded its public relations department, did not respond Friday to an email seeking comment. The company says in owner’s manuals and on its website that both Autopilot and “Full Self-Driving” are not fully autonomous and that drivers must pay attention and be ready to intervene at any time.