Third Fatal Tesla Autopilot Crash Renews Questions About System

Tesla's "Autopilot" system was engaged by a driver who was killed in a March crash in Florida, according to an initial accident report released Thursday.

Preliminary data showed the Tesla driver engaged "Autopilot" about 10 seconds before the crash and that the device was active at the time the vehicle was struck by a truck-tractor semitrailer, the National Transportation Safety Board said.

The accident, the latest involving Autopilot, left the Tesla driver, a 50-year-old male dead and the combination vehicle driver uninjured.