Tesla NASDAQ:TSLA is facing renewed scrutiny after a Texas man was charged with manslaughter following a Model 3 crash into a home that killed a 76-year-old woman.

Michael David Butler, 44, told paramedics the car was on Autopilot when it hit Martha Avila's home in Katy, Texas, according to an arrest affidavit. Butler said he was making a DoorDash delivery, changed the music and eventually passed out. The vehicle was reportedly operating in Full Self-Driving mode.

Tesla has disputed Butler's account, with CEO Elon Musk saying a vehicle in Full Self-Driving mode drives slowly through neighborhood streets.

The National Highway Traffic Safety Administration is investigating the crash and has opened nearly 50 probes into Tesla crashes involving advanced driver-assistance systems since 2016.