In the past year, there have been at least three fatal crashes when Tesla cars were in self-driving mode.
The government alleges Anthony Levandowski stole Waymo documents in 2016 while he worked there as an engineer, then took them to Uber.
The death of 49-year-old Elaine Herzberg was the first known fatality linked to an autonomous vehicle in the United States.
Tempe Police concluded the accident was "entirely avoidable."
The NTSB published a preliminary report on the incident Thursday.
It's not yet known if the autopilot was engaged. The car's driver suffered a broken ankle.
The first-of-its-kind accident killed a pedestrian in Arizona earlier this year.
The consequences of a fatal crash in Arizona continue.
Gov. Doug Ducey said he was prompted to act after seeing the "disturbing" videos of the fatal crash involving an autonomous Uber vehicle.
Experts say the autonomous vehicles sensors should have identified that a person was in the road.