With at least two federal investigations underway into the fatal crash of a Tesla Model S running in Autopilot mode, there are signs that the auto industry could be applying the brakes in the race to bring autonomous vehicles to market. General Motors Chairman and CEO Mary Barra said the maker will "step back" and take another "look at what technology is in the best interest of consumers," including GM's new Super Cruise system, a technology similar to Tesla's Autopilot.