since the fiery crash on highway 101 that killed walter huang. for his widow is pain is fresh. >> we miss him so much. not just family. friends miss him a lot. now she's filed a lawsuit saying tesla is responsible for his death. the document alleges tesla's autopilot feature was defective. it pointed him at a concrete barrier and accelerated almost 10 miles per hour in three seconds and drove him into the barrier zzzzzz. >> are the vehicle was traveling 70 miles per hour at the point of impact a.passerby pulled him from the car but it was too late. i think they knew there were problems and glitches with the auto pilot. >> reporter: a preliminary report from the ntsb said the vehicle did not detect the driver's hands on the wheel in the six seconds before the crash. >> i think there is a lot of confusion about auto pilot which tesla encourages just by calling it auto pilot. it is not an automatic pilot. it's a fancy cruise control. >> reporter: while tesla declined to comment on the today but they say owners have engaged on this highway roughly 85,000 time. it was on this same stretch