A breath-test number can matter after an alcohol-related crash, but it does not answer every question in an injury claim. It may help show a driver’s alcohol concentration when the sample was taken. It does not, by itself, establish how the crash happened, whether the test was administered correctly, or which injuries the collision caused.
Those questions require the test record, its timing, the officer’s observations, video, witness accounts, and the physical evidence from the crash. A useful review starts by separating what the number may show from what still needs proof.
What does a Louisiana breath-test result show?
Louisiana Revised Statute 14:98 defines operating while impaired to include operating with a blood alcohol concentration of 0.08 percent or more. It also covers impairment by alcohol even when the state is not relying only on that numerical threshold. The statute addresses the criminal offense. A related civil injury claim still requires proof tying the driver’s conduct to the crash and the claimed harm.
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| Question | What the breath result may help show | What needs other evidence |
|---|---|---|
| Was alcohol present? | The reported concentration in the breath sample. | Whether the sample reliably reflected the driver’s condition at the time of the crash. |
| Was the driver impaired? | A reading at or above a statutory threshold may be important evidence. | Driving behavior, officer observations, video, witness accounts, and any drug evidence. |
| Did impairment cause the crash? | The result may support a broader causation theory. | Lane position, speed, right of way, braking, visibility, vehicle data, and the collision sequence. |
| Was the test dependable? | The printout identifies the reported result and often the testing time. | Device records, operator records, required procedures, and video of the testing process. |
The distinction matters because a strong number does not repair a weak crash investigation. It also prevents the opposite mistake: treating a disputed breath test as if no other evidence of unsafe driving exists.
Why timing and testing records matter
Alcohol concentration changes over time. The gap between the collision, the traffic stop, the arrest, and the test can therefore matter. Record the time shown on the breath-test printout and compare it with dispatch records, body-camera timestamps, hospital records, receipts, photographs, and phone data.
The supporting paperwork can be as important as the number. Depending on what was used, relevant records may include the device identifier, maintenance or calibration history, operator credentials, observation-period documentation, printouts, error messages, and reports prepared under Louisiana’s chemical-testing statutes. R.S. 32:666 requires an officer’s report when a person submits or refuses to submit to a chemical test and calls for available test information when the person submits.
The civil claim is not the criminal case
A DWI or operating-while-impaired arrest and a personal injury claim may arise from the same crash, but they answer different questions. The prosecution addresses a criminal charge. The civil claim asks who caused the collision, what losses followed, and which person or insurer is legally responsible.
An arrest is not a civil judgment. A charge may later be reduced or dismissed for reasons that do not erase the crash evidence. Likewise, a conviction does not eliminate the need to prove causation and damages. The police file, test records, video, vehicle evidence, medical documentation, and witness testimony should be evaluated together.
The firm’s Baton Rouge drunk-driving accident page explains this civil focus. The articles on what to do when the other driver received a DUI and Mardi Gras drunk-driving crashes address the next steps in two common settings.
Records worth preserving after the crash
Start with materials that may be overwritten, repaired, or dispersed. That usually means identifying video sources and the vehicles before focusing on a long checklist.
- the breath-test printout and every notice given to the tested driver;
- body-camera, dash-camera, business, residential, and traffic-camera video;
- 911 audio, dispatch records, and the crash report number;
- photographs of the roadway, vehicles, containers, debris, and visible injuries;
- vehicle event data and inspection evidence when the collision is serious;
- witness names and contact information;
- medical records that document the injury timeline; and
- insurance correspondence, recorded-statement requests, and settlement offers.
If someone was injured and alcohol evidence may affect the claim, Babcock Injury Lawyers can evaluate the civil case and identify records that may need to be preserved. The firm does not provide criminal DWI defense through this page. A person facing a criminal charge should promptly consult a qualified criminal-defense lawyer about that separate matter.
Sources and accuracy
Sources checked September 28, 2026: current La. R.S. 14:98, La. R.S. 32:661, La. R.S. 32:666, and the National Highway Traffic Safety Administration’s impaired-driving guidance. This article provides general information, not legal advice or an opinion about a particular breath test.