Dallas, TX — July 21, 2025, one person was killed and six others were injured in a truck accident at about 12:30 p.m. near the intersection of Plano Road and West Miller Road.

Authorities said the driver of a semi-truck reportedly lost consciousness while driving through the intersection. The truck crashed into four other vehicles: another semi, a DART bus, a box truck and a sedan.

The truck driver died at the scene of the crash, according to authorities.

Six other people were hospitalized with unspecified injuries, authorities said. One was in critical condition.

Authorities have not released any additional information about the crash at this time. The accident is still under investigation.

Commentary by Attorney Michael Grossman

When people hear that a truck driver “lost consciousness” and then plowed into multiple vehicles, it naturally raises a question that the initial reports don’t answer: Why did that happen in the first place? Was this a sudden medical emergency? A predictable result of fatigue? Or something else entirely?

At this point, we don’t know enough to say. But that uncertainty is exactly why a deeper investigation matters.

In any serious truck crash, investigators should start by gathering the kinds of objective data that help fill in the blanks. That includes engine control module (ECM) data, dash cam footage and cell phone records. If the truck had an in-cab camera, it may show exactly when the driver started losing control, or whether there were warning signs before that. Similarly, the ECM can tell us things like speed, braking and steering inputs just before impact.

If the trucker truly lost consciousness, we need to know why. Was it an unforeseeable medical condition, or something that a routine physical or employer screening should have caught? Was this someone working an overly long shift who hadn’t had rest? Was the driver using prescription or over-the-counter medications that impair awareness? These are all things that don’t show up in police statements, but that can surface through subpoenaed records and expert medical review.

And then there’s the company’s role. What hiring policies were in place? What did they know about this driver’s history? Were there prior incidents of concern? I once handled a case where the trucking company hired someone who’d been fired from multiple previous jobs. They gave her a 20-minute road test and checked the box. When a crash happened, everyone acted shocked, but in reality, the company had ignored red flags that would’ve been obvious to anyone paying attention.

Finally, it’s not clear from current reports which vehicle the deceased person occupied. Depending on whether they were in the sedan, the bus, one of the trucks or even a bystander, very different liability questions could arise. That’s yet another reason why the complete picture of the crash must be reconstructed using hard evidence, not assumptions.

Key Takeaways:

• Authorities say the truck driver lost consciousness, but it’s unclear whether that was a known risk or a sudden emergency.
• Critical evidence like dash cams, ECM data and cell phone records can shed light on what actually happened before the crash.
• The driver’s medical history, work schedule and hiring process should all be reviewed to determine if the incident was preventable.
• It’s not yet known which vehicle the deceased person was in, which makes determining fault more complex.
• A full investigation is needed to identify who, if anyone, failed to do their job, and how those failures may have contributed to the crash.