"The National Highway Traffic Safety Administration has announced that it will not seek a recall of Tesla's Autopilot driver-assist feature following a six-month investigation into a crash that resulted in the death of a driver. Joshua Brown, 40, was killed in May 2016 while using the feature in a Tesla Model S during a collision with a trailer of an 18-wheeler that crossed the road in front of the Model S.
During the course of its investigation the agency determined that Brown had been using Autopilot, but that the Automatic Emergency Braking (AEB) did not warn the driver or activate in the moments prior to the collision. The NHTSA also determined that Brown did not attempt to brake or steer in the moments prior to the collision.
The NHTSA action essentially clears Tesla in regards to a safety-related defect trend, though the agency also states that despite the decision to close the investigation "The closing of this investigation does not constitute a finding by NHTSA that no safety-related defect exists." That's as close to an investigation closure as this particular event gets, with the nuance being the lack of finding a specific safety-related trend, which could have eventually led to a recall. ”