"Larry" (the rest of the identification information was redacted) was driving with his daughter when he heard a nearby siren and, while trying to figure out where it was coming from, nearly hit a pedestrian "with dark clothes and in the middle of the road (not near an intersection)." He vouched that the car beeped, and then braked itself before he had a chance to react, and the car stopped "inches" from the pedestrian. Musk, never shy about promoting the attributes of Autopilot, added that the incident was confirmed by vehicle logs.
Last week, the US Senate Committee on Commerce, Science, and Transportation requested that Musk come to Washington to talk about Autopilot and its technology. Additionally, the National Highway Traffic Safety Administration (NHTSA) opened an investigation into an accident involving a Florida Tesla driver who was killed while he may have been using Autopilot.
On Sunday, Musk, in a series of Tweets, forecast "moderate and maybe big advances" in Autopilot. He continues to defend Autopilot, noting both that a recent Pennsylvania crash involving a Tesla driver took place when Autopilot wasn't engaged, and that the company has no plans to remove the feature.