Two major U.S. safety agencies are now investigating a fatal Tesla crash in Katy, Texas, where a Model 3 struck a home at high speed, killing a 76-year-old resident and injuring another person. The National Transportation Safety Board (NTSB) announced its investigation on Wednesday, joining the National Highway Traffic Safety Administration (NHTSA), which announced its probe on Monday. The incident has also sparked a wrongful death lawsuit from the victim's family, who allege that Tesla's Autopilot and Full Self-Driving (FSD) systems are defective and that the company failed to warn drivers of safety risks.

The crash occurred on June 19 when the Tesla Model 3's driver, Michael Butler, engaged Autopilot before plowing through the front wall of Martha Avila's home. Avila, 76, was pinned by the vehicle and died later at a nearby hospital. Justin Barbour, Avila's son-in-law, was also injured in the incident. According to the Harris County Sheriff's Department, Butler told law enforcement he was using a driver assistance system at the time of the crash.

What Does Tesla Say About the Crash?

Tesla and CEO Elon Musk have disputed the family's characterization of the incident. Musk posted on X that "FSD drives slowly through neighborhood streets and this was a high speed crash," suggesting the system was not responsible for the high-speed impact. Ashok Elluswamy, Tesla's vice president of AI software, went further, stating that "the driver manually overrode self-driving by pressing the accelerator all the way to 100% of the accel pedal in this residential area".

"The driver manually overrode self-driving by pressing the accelerator all the way to 100% of the accel pedal in this residential area," stated Ashok Elluswamy.

Ashok Elluswamy, Vice President of AI Software at Tesla

Tesla maintains that both Autopilot and Full Self-Driving require "fully attentive" drivers with their hands on the wheel. The company describes Autopilot as enabling vehicles to steer, accelerate, and brake within their lanes, while Full Self-Driving allows vehicles to obey traffic signals and change lanes. However, these claims have become increasingly scrutinized as investigations mount.

What Pattern of Safety Concerns Surrounds Tesla's Driver-Assistance Systems?

This Texas crash represents the latest incident in a troubling pattern of safety concerns involving Tesla's driver-assistance technology. The regulatory scrutiny reflects growing questions about whether these systems are as safe as the company claims.

• NHTSA Special Investigations: Since 2016, the NHTSA has opened nearly 50 special investigations into Tesla crashes believed to involve advanced driver assistance systems, with approximately two dozen deaths reported across these incidents.
• Visibility Detection Issues: In March 2026, the NHTSA escalated its probe into 3.2 million Teslas equipped with Full Self-Driving, concerned that the system may fail to detect or warn drivers in poor visibility conditions.
• Previous Recalls: In 2023, Tesla recalled about 2 million vehicles, nearly all of its electric vehicles on U.S. roads, to better ensure that drivers pay attention when using Autopilot.

The NTSB has investigated numerous Tesla crashes in which driver-assistance systems were in use, making this investigation part of an ongoing pattern of regulatory concern.

What Legal Action Has the Family Taken?

The family of Martha Avila filed a lawsuit in Harris County, Texas state court seeking more than $1 million in damages, plus punitive damages reflecting Tesla's alleged "reckless disregard for a substantial risk of severe bodily injury." The complaint, filed on Tuesday, names both Tesla and Musk as defendants, alleging gross negligence and failure to warn that Autopilot and Full Self-Driving systems were defective.

Harris County

Michael Butler, the driver of the Tesla, is also named as a defendant in the lawsuit. It remains unclear whether he has legal representation, and efforts to reach him have been unsuccessful. The Barbours' legal team has not yet provided additional comment on the case.

Tesla and Musk did not immediately respond to requests for comment regarding the lawsuit or the dual federal investigations. As both the NTSB and NHTSA proceed with their inquiries, the outcome could have significant implications for Tesla's driver-assistance systems and the broader autonomous vehicle industry.