Dallas, TX — September 17, 2025, Ronnyher Diaz Caldera was killed in a car accident at about 11:53 p.m. on southbound Interstate 35E.

A preliminary accident report indicates that a 2009 GMC Sierra hit a pedestrian north of Empire Central Place when someone opened the door of a 2012 Ford Fusion into the traffic lane.

The pedestrian, 33-year-old Ronnyher Jesus Diaz Caldera, died at the scene of the crash, according to the report.

The GMC driver was not hurt, the report states.

Authorities have not released any additional information about the Dallas County crash at this time.

Commentary by Attorney Michael Grossman

After any tragic accident on a busy highway, the loss often raises hard questions that go beyond the initial report. Moments like these force us to think about what led to such outcomes and whether all the right steps were taken to fully understand what happened.

Did the authorities thoroughly investigate the crash? When a fatal crash involves something as specific as a car door being opened into traffic, it’s not enough to take statements and move on. Investigators should have mapped the scene with precision tools, checked the timing and spacing of vehicles and examined whether any distractions or errors occurred before the impact. In late-night incidents especially, understanding the sequence of events takes careful attention and the skills of the investigating team can make or break the analysis. If those steps weren't followed closely, key facts might never come to light.

Has anyone looked into the possibility that a vehicle defect caused the crash? Even if this incident seems to hinge on a door being opened, that doesn't automatically rule out a mechanical issue. A faulty door latch, for example, might cause a door to swing open unexpectedly. Likewise, if the striking vehicle had lighting issues or malfunctioning sensors, that could affect reaction times. It's worth asking whether both vehicles were inspected to rule out these possibilities, because not all defects leave clear evidence behind.

Has all the electronic data relating to the crash been collected? Modern vehicles can hold valuable clues about what the drivers were doing in the moments leading up to impact. Data like speed, braking, lane position or even whether a vehicle sensed an object ahead could clarify what the drivers saw, or didn't see. Phones, GPS and even nearby traffic cameras might also offer a timeline. When data like this is ignored, it leaves investigators relying too heavily on assumptions.

These are the kinds of questions that help ensure every crash is understood, not just accepted. When the focus stays on the surface, critical details can be overlooked, and families are left without the full picture.

Key Takeaways:

• It's not clear if investigators used advanced tools or checked driver behavior before the crash.
• A mechanical problem, like a faulty door latch or lighting issue, can't be ruled out without proper inspection.
• Vehicle and phone data could show whether either driver had time to react, or saw anything at all.