Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. California prosecutors have asked a court to delay a trial for a Tesla Model S driver who faces manslaughter charges over a 2019 crash that left two people dead, according to court documents. The trial, originally scheduled to take place on Tuesday in the Los Angeles area, marks the first criminal case against a driver who was using partially automated driving technology at the time of the crash. Prosecutors want to push back the trial to late February or later, saying two police officers assigned to the case would be on medical leave and vacation.

Fox News Flash top headlines for September 4 are here. Check out what's clicking on Foxnews.com A government report says the driver of a Tesla that slammed into a firetruck near Los Angeles last year was using the car's Autopilot system when a vehicle in front of him suddenly changed lanes and he didn't have time to react. The report raises further questions about the effectiveness of Tesla's system, which was in operation before several other crashes including two fatalities in Florida and one in Silicon Valley. Tesla warns drivers that the system is not fully autonomous and drivers must be ready to intervene.