Tesla tumbles as NTSB probe compounds self-driving car worries

Tesla, the electric-car maker headed by Elon Musk, tumbled on Monday as the government’s probe of a fatal crash involving its assisted-driving equipment heightened concerns about the technology’s reliability.

A 38-year-old Apple engineer, Walter Huang, was killed in the crash, which occurred when his Tesla Model X struck a road barrier on March 23 in Mountain View, Calif., according to the California Highway Patrol. The accident occurred less than a week after a pedestrian in Tempe, Ariz., died from injuries when she was struck by a self-driving Uber vehicle, a fatality believed to be the first of its kind.