Houston · Harris County · Galveston · Fort Bend · Federal — Southern District of TexasHouston · Harris County · Galveston

In a DWI crash case, intoxication alone is not enough — the State must prove your driving caused the injury or death. That single word, "caused," is where many felony intoxication assault and intoxication manslaughter cases are won or lost. If another driver, a road hazard, weather, or a mechanical failure caused the crash, causation fails — and a felony can fall to a misdemeanor DWI or a dismissal. This is the exact terrain our attorneys worked on the Vehicular Crimes Team.

If you or a loved one is facing a DWI crash case in Houston, Harris County, or Galveston, Brian Foley and Luis Baez can help.

Why Causation Is the Battleground

The felony intoxication statutes require the State to prove that your intoxicated operation caused the result. That means a crash case has two independent questions: Were you intoxicated? And did your driving cause the injury or death? A strong defense attacks both — and causation is frequently the more winnable of the two, because real crashes rarely have a single, simple cause.

What Crash Investigation Examines

EvidenceWhat it can show
Event data recorder ("black box")Speed, braking, throttle in the seconds before impact
Skid marks & points of impactAngles, speeds, and who entered whose lane
Vehicle damageDirection and force of the collision
Roadway & conditionsDesign defects, visibility, weather contributions
Witness & video evidenceIndependent accounts of how the crash unfolded
Preserve the evidence fast

Vehicles are often released, repaired, or scrapped within weeks, and event-data recorders can be lost. Getting a defense team and an independent reconstructionist involved early can make the difference between preserving decisive evidence and losing it forever.

How We Fight It

  • Independent reconstruction. We retain qualified accident-reconstruction experts to build an alternative, evidence-based account of the crash.
  • Preserving vehicle and scene data. We move quickly to secure event-data recorders, the vehicles, and scene measurements.
  • Alternative causes. Another driver, a hazard, road design, or a mechanical failure can be the true cause.
  • Challenging intoxication too. We simultaneously attack the stop, field sobriety testing, and blood evidence.
  • Insider knowledge. Because our attorneys built these cases as prosecutors, we know the State's reconstruction methods and their weaknesses.

Related Pages

Why HCDA

Brian Foley is Board Certified in Criminal Law, and both he and Luis Baez are former prosecutors who served on the Vehicular Crimes Team with training in accident reconstruction and crash investigation. If you or a loved one is facing a DWI crash case in Houston, Harris County, or Galveston, contact Houston Criminal Defense Attorneys PLLC for a free, confidential consultation. Call or text (713) 703-1718.

Frequently Asked Questions


Why does causation matter in a DWI crash case?
In felony intoxication cases — intoxication assault and intoxication manslaughter — the State must prove that your intoxicated driving actually caused the injury or death. Being intoxicated is not enough; if the crash was caused by another driver, road conditions, or a mechanical failure, causation fails and a felony can drop to a misdemeanor DWI.
How is causation challenged after a crash?
Through accident reconstruction and careful review of the physical evidence — skid marks, vehicle damage, points of impact, vehicle 'black box' (event data recorder) information, roadway design, weather, and witness accounts. This evidence frequently shows that another factor, not intoxication, caused the outcome.
What is an event data recorder and why does it matter?
Most modern vehicles contain an event data recorder — a 'black box' that captures speed, braking, throttle, and other data in the seconds before a crash. That data can confirm or contradict the State's theory about how the crash happened, and preserving it quickly is critical because vehicles are often released and repaired or scrapped.
Can the crash be blamed on the other driver?
It can, when the evidence supports it. Another driver running a light, an unavoidable hazard, poor road design, or a sudden mechanical failure can be the true cause. The State's burden is to prove your driving caused the result, and a thorough reconstruction can show that it did not.
Why does Vehicular Crimes experience help with causation?
Causation and crash investigation are the heart of what the Vehicular Crimes Team does. Brian Foley and Luis Baez were trained in accident reconstruction and crash-scene investigation as prosecutors and worked these cases from the scene forward, so they know how to test and challenge the State's causation theory.

Speak With a Houston Criminal Defense Attorney Today


Free, confidential consultation with Board Certified criminal defense attorneys and former prosecutors.

(713) 703-1718