NTSB: Tesla Driver Overrode Self-Driving Before Fatal Texas Crash
A federal investigation has confirmed that a Tesla driver manually overrode the vehicle’s Full Self-Driving system moments before a catastrophic crash that killed a 76-year-old grandmother inside her Katy, Texas home. The National Transportation Safety Board released its preliminary findings on July 15, revealing that driver Michael Butler, 44, pressed the accelerator pedal to 100%, propelling his 2025 Tesla Model 3 to speeds exceeding 70 mph in a residential zone with a 30 mph limit.
The crash, which occurred on June 19 at approximately 8:03 p.m. CDT on Rose Hollow Lane, left Martha Avila fatally injured. Security camera footage showed the vehicle continuing straight through an intersection where the road terminates, leaving the roadway and striking the residence. The NTSB noted clear weather, dry roads, and daylight conditions at the time of the incident.
What the NTSB Found
According to the NTSB’s preliminary report, Butler had engaged Tesla’s Full Self-Driving (Supervised) system — classified as an SAE Level 2 advanced driver-assistance system. Electronic data recovered from the vehicle showed that before the crash, “the driver manually overrode FSD (Supervised) by pressing the accelerator pedal to 100%.”
Tesla’s AI Software Lead, Ashok Elluswamy, posted on X that the driver “reached a speed of 73 mph during the crash, and had the accelerator pressed even after the crash.” Tesla CEO Elon Musk also disputed that FSD caused the crash, writing that “FSD drives slowly through neighborhood streets and this was a high-speed crash!”
Driver’s Troubling Search History
Court documents reveal a disturbing pattern of behavior. The Harris County Sheriff’s Office alleged that Butler conducted multiple Google searches prior to the crash, including queries about Tesla’s FSD mode not being “aggressive enough” and being “too timid.” These searches suggest Butler may have been intentionally testing or pushing the system’s limits rather than relying on it as intended.
Butler was arrested on July 1 and charged with manslaughter, with bail set at $150,000. He is scheduled to appear in court on August 10.
A Family’s Grief and Quest for Justice
Martha Avila’s family filed a wrongful-death lawsuit against both Butler and Tesla on June 23, seeking over $1 million in damages. The lawsuit alleges negligence and design defects, including failure to adequately monitor driver engagement and failure to detect stationary objects and roadway terminations.
“She was the best grandma anyone could’ve asked for. A second mother for my kids and a blessing. We are heartbroken,” Jennifer Barbour, Avila’s daughter, told USA TODAY.
Broader Implications for Tesla and Self-Driving Technology
This crash occurs against a backdrop of intensifying scrutiny of Tesla’s driver-assistance systems. A 2023 analysis of NHTSA data by The Washington Post identified at least 17 fatal incidents linked to Tesla’s Autopilot, and by mid-2023, the system had been involved in at least 736 crashes since 2019. In 2023, NHTSA announced a recall of more than 2 million Tesla vehicles over Autopilot concerns, and in 2024, federal investigators launched a probe into whether that recall had been adequate.
While the NTSB’s preliminary findings place primary responsibility on Butler for overriding the system, the case raises a critical question: does Tesla’s marketing of “Full Self-Driving” create unrealistic expectations about what the technology can actually do? The name itself suggests full autonomy, yet the system requires constant driver supervision. Butler’s alleged searches for ways to make FSD more aggressive highlight a potential disconnect between driver expectations and system limitations.
What Comes Next
The NTSB says all aspects of the crash remain under investigation, with the intent of issuing safety recommendations to prevent similar incidents. The National Highway Traffic Safety Administration has also opened a special crash investigation. The outcome of both the criminal case against Butler and the civil lawsuit against Tesla could have significant implications for how courts allocate responsibility between drivers and automakers in crashes involving advanced driver-assistance systems.
For now, the tragedy serves as a stark reminder that Level 2 systems — despite their names — are not autonomous. The driver remains ultimately responsible for the vehicle’s operation, a lesson that proved devastatingly costly on a quiet June evening in Katy.