The National Transportation Safety Board says electronic data from a 2025 Tesla Model 3 shows its driver manually overrode Full Self-Driving (Supervised) immediately before the June 19 crash into a Katy, Texas, home that killed 76-year-old Martha Avila.
In a preliminary report released July 15, the NTSB said the driver had engaged Tesla’s advanced driver-assistance system before pressing the accelerator pedal to 100%. The agency said the vehicle was traveling at more than 70 mph when it crashed. The finding corroborates the earlier account from Harris County investigators, who alleged that the driver overrode the system.
Houston Public Media reported that the driver, 44-year-old Michael Butler, had initially told authorities the Tesla was in Autopilot at the time of the crash. Butler was later arrested and charged with manslaughter; that criminal case remains pending.
The NTSB’s finding is narrow but significant: it attributes the immediate acceleration command to driver input recorded by the vehicle, rather than treating the crash as an unexplained failure while FSD (Supervised) was operating.
That does not close the federal inquiry. The NTSB explicitly labels its report preliminary, says all aspects of the crash remain under investigation, and may issue safety recommendations after its work is complete. A preliminary factual report is not a final probable-cause determination.
The agency’s wording also matters in a recurring debate over Tesla’s driver-assistance branding. It identifies Full Self-Driving (Supervised) as an advanced driver-assistance system, not a system that eliminates the driver’s role. The reported accelerator input effectively took priority over the system’s active driving controls.
Tesla CEO Elon Musk and Ashok Elluswamy, the company’s vice president of AI software, had previously said on social media that the driver overrode the system by fully depressing the accelerator. Tesla had not responded to Houston Public Media’s request for comment on the NTSB report.
For users of driver-assistance technology, the practical point is uncomplicated: an engaged assistance mode does not prevent a driver from commanding acceleration, and vehicle logs can preserve that distinction after a crash.
The NTSB’s final findings and any resulting safety recommendations will determine whether the investigation expands beyond the driver’s recorded override.
In a preliminary report released July 15, the NTSB said the driver had engaged Tesla’s advanced driver-assistance system before pressing the accelerator pedal to 100%. The agency said the vehicle was traveling at more than 70 mph when it crashed. The finding corroborates the earlier account from Harris County investigators, who alleged that the driver overrode the system.
Houston Public Media reported that the driver, 44-year-old Michael Butler, had initially told authorities the Tesla was in Autopilot at the time of the crash. Butler was later arrested and charged with manslaughter; that criminal case remains pending.
What the preliminary report establishes
The NTSB’s finding is narrow but significant: it attributes the immediate acceleration command to driver input recorded by the vehicle, rather than treating the crash as an unexplained failure while FSD (Supervised) was operating.That does not close the federal inquiry. The NTSB explicitly labels its report preliminary, says all aspects of the crash remain under investigation, and may issue safety recommendations after its work is complete. A preliminary factual report is not a final probable-cause determination.
The agency’s wording also matters in a recurring debate over Tesla’s driver-assistance branding. It identifies Full Self-Driving (Supervised) as an advanced driver-assistance system, not a system that eliminates the driver’s role. The reported accelerator input effectively took priority over the system’s active driving controls.
Legal and product implications
The NTSB’s account strengthens the factual basis for the manslaughter charge against Butler, while Tesla and Butler also face a wrongful-death lawsuit filed by Avila’s family. Neither case is resolved, and the preliminary report does not determine civil or criminal liability.Tesla CEO Elon Musk and Ashok Elluswamy, the company’s vice president of AI software, had previously said on social media that the driver overrode the system by fully depressing the accelerator. Tesla had not responded to Houston Public Media’s request for comment on the NTSB report.
For users of driver-assistance technology, the practical point is uncomplicated: an engaged assistance mode does not prevent a driver from commanding acceleration, and vehicle logs can preserve that distinction after a crash.
The NTSB’s final findings and any resulting safety recommendations will determine whether the investigation expands beyond the driver’s recorded override.
References
- Primary source: Houston Public Media
Published: 2026-07-15T21:46:26+00:00
Preliminary NTSB findings: Driver in fatal Tesla crash in Katy overrode self-driving mode – Houston Public Media
A report released Wednesday by the National Transportation Safety Board corroborated findings by Harris County law enforcement in the aftermath of the June 19 crash.
www.houstonpublicmedia.org
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