Tesla is considering two possible scenarios that would explain the fatal Model S crash in Florida, and according to Reuters and The New York Times, neither is about Autopilot. During a meeting with the US Senate Commerce Committee, the automaker reportedly presented two theories. First is the possibility that the car's automatic emergency braking system's camera and radar didn't detect the incoming truck at all. The other theory is that the braking system's radar saw the truck but thought it was part of a big structure, such as a bridge or a building. It's programmed to ignore huge structures to prevent false braking, after all.