What to Do in the First 24 Hours After an 18-Wheeler Crash in Louisiana

If an 18-wheeler hit you yesterday, the most important evidence in your case may already be on a deletion timer.

That isn’t a sales line. It’s how commercial trucking works. The truck’s onboard computer can overwrite crash data in as little as fourteen days. The trucking company’s rapid-response team, investigators, defense attorneys, and adjusters, is often dispatched within hours of the wreck. Their job is to protect the carrier. Yours, in the first 24 hours, is to protect your health and your case before either gets quietly buried.

Here is what that looks like, step by step, under Louisiana law as it stands in 2026.

1. Get medical care, even if you think you’re “fine”

Adrenaline masks injury. Soft-tissue damage, internal bleeding, and traumatic brain injuries routinely show up hours or days after a wreck, not at the scene. Two things follow from that:

• See a doctor the same day. An ER visit, urgent care evaluation, or your primary physician all create the contemporaneous medical record an insurer will later demand. Gaps in treatment are one of the first things an adjuster uses to argue your injuries weren’t really caused by the crash.

• Tell the provider everything that hurts. Not just the worst pain. If your neck, back, and right knee all ache, all three need to be in the chart. Anything you don’t mention on day one becomes “pre-existing” or “unrelated” later.

If you were transported by ambulance, that record exists already. If you refused transport at the scene and now feel worse, go in anyway. The longer you wait, the easier it is for the carrier’s insurer to argue something else caused the injury.

2. Make sure law enforcement is on the scene and a report gets written

Under Louisiana Revised Statutes § 32:398, drivers must report any crash involving injury, death, or apparent property damage over $500. For a wreck with a tractor-trailer, that threshold is met before you even think about it.

If the crash happened on an interstate or state highway, Louisiana State Police typically work it. Inside Baton Rouge city limits, that is BRPD; outside the city but inside the parish, that is East Baton Rouge Sheriff’s Office. Make sure an officer responds and a crash report gets written. State Police reports are usually available roughly 10 to 15 business days later through crashreports.dps.la.gov.

When the officer talks to you, stick to facts: where you were, what you saw, what hurts. Do not guess at speeds, do not estimate fault, and do not apologize. Apologies feel polite at the scene and read like admissions on the page.

WHY THIS MATTERS IN 2026

Louisiana’s comparative fault rule changed on January 1, 2026. Under the amended Louisiana Civil Code article 2323 (Act 15 of 2025), an injured person found 51% or more at fault recovers nothing, not a reduced amount, nothing. That makes every off-the-cuff statement at the crash scene more dangerous than it used to be. The difference between 49% and 51% is now the difference between a full case and no case at all.

3. Document the scene before it disappears

If you are physically able, photograph everything before you leave: both vehicles from multiple angles, the trailer’s DOT number and license plate, the driver’s CDL and the carrier’s name on the cab, skid marks, debris, road conditions, weather, traffic signs, and any visible injuries. Get names and phone numbers from every witness who will give them. Witnesses scatter quickly, and police reports rarely capture all of them.

If a nearby business has a security camera that may have caught the crash, note it. Most commercial systems overwrite within 7 to 30 days. Your attorney will need to request preservation in writing, fast.

4. Say nothing to the trucking company’s insurer

Within a day or two, expect a call. The voice on the other end will be friendly and will want a “quick recorded statement” or to confirm “just a few details.” You are under no obligation to give one. Anything you say will be recorded, transcribed, and used to build the carrier’s defense, including locking you into an early version of events before you’ve seen the police report or finished diagnostic imaging.

“I’m still being treated and I’m not giving a statement at this time” is a complete and appropriate answer. So is hanging up and letting your attorney handle the next call.

5. Understand what evidence is on a clock, and act before it’s gone

This is what makes 18-wheeler cases different from ordinary car wrecks. A modern commercial truck is a rolling data recorder, and the people who control that data are the same people whose negligence may have caused your injuries. Three categories matter most:

• The Engine Control Module (ECM) and Event Data Recorder (EDR). Often called the truck’s “black box.” Records speed, throttle, brake application, and engine data in the seconds around impact. There is no federal rule requiring a carrier to preserve this. Some systems overwrite in as little as 14 days.

• The Electronic Logging Device (ELD). Federally required under 49 C.F.R. Part 395. Tracks the driver’s on-duty, off-duty, and driving hours, synced to GPS. Carriers must keep it for six months, meaning it is still recoverable, but only if requested before the window closes.

• Dashcams, driver qualification files, maintenance logs, and dispatch communications. All controlled by the carrier. All routinely overwritten or discarded under “normal business” document policies once enough time passes.

Hours-of-service violations are common in catastrophic crashes. Federal rules limit a driver to 11 hours of driving after 10 consecutive hours off duty, within a 14-hour on-duty window. The ELD shows whether the driver was inside those limits. The ECM shows what the truck was doing at impact. Together, they tell a story that no driver statement and no carrier press release can override, but only if the data still exists when your lawyer asks for it.

6. Call a trial lawyer, not just any personal injury firm

The single most consequential step in a serious truck case is sending a written preservation demand, commonly called a spoliation letter, to the carrier, the driver, the insurer, and any other entity that may control the evidence. It freezes their document-destruction policies and puts them on legal notice. Practitioners send these within 24 to 72 hours of the crash. After that, every passing day is a day of evidence that may not be recoverable.

That is also the reason it matters whether the lawyer you call actually tries cases. Insurance carriers know which firms file suit and prepare for trial and which firms settle every file at policy limits. They price their offers accordingly. A firm experienced in commercial trucking litigation will know what to demand, what to subpoena, and what an FMCSA violation is worth on a verdict form.

THE DEADLINE TO FILE

For crashes occurring on or after July 1, 2024, Louisiana gives injured people two years from the date of the wreck to file a personal injury lawsuit (La. Civ. Code art. 3493.1). That is twice the prior one-year deadline, but it is still tight when serious injuries are involved, and the evidence deadlines (days, not years) are far shorter. Some claims, including certain wrongful-death and product-liability matters, follow different rules. If you are unsure which deadline applies, ask before assuming.

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Frequently Asked Questions

Do I have to give a recorded statement to the trucking company's insurance?

No. You are under no obligation to give a recorded statement to the carrier's insurer, and doing so before you have seen the police report and completed diagnostic imaging often hurts your case. The adjuster's job is to build the carrier's defense, your statement will be transcribed and used to lock you into an early version of events. A complete and appropriate response is: "I'm still being treated and I'm not giving a statement at this time."

How long does the truck's black box keep crash data?

There is no federal rule requiring a carrier to preserve Engine Control Module (ECM) or Event Data Recorder (EDR) data after a crash. Some systems overwrite this information in as little as 14 days. Electronic Logging Device (ELD) data, which tracks the driver's hours of service, must be kept for six months under 49 C.F.R. Part 395, but only if requested before that window closes. Dashcam footage, maintenance logs, and dispatch communications are routinely discarded under "normal business" document policies once enough time passes.

How long do I have to file an 18-wheeler accident lawsuit in Louisiana?

For crashes occurring on or after July 1, 2024, Louisiana gives injured people two years from the date of the wreck to file a personal injury lawsuit under Louisiana Civil Code article 3493.1. That is twice the prior one-year deadline. Some claims, including certain wrongful-death and product-liability matters, follow different rules, so confirm with a Louisiana attorney which deadline applies to your specific situation.

What is a spoliation letter and why does it matter?

A spoliation letter is a written preservation demand sent to the trucking company, the driver, the carrier's insurer, and any other party that may control evidence in the case. It puts them on legal notice to stop their routine document-destruction policies, freezing the black box data, electronic logging device records, dashcam footage, driver qualification files, and maintenance logs in place. Trial lawyers typically send these within 24 to 72 hours of the crash because critical evidence can be overwritten in as little as 14 days. The delay between the wreck and the first call to an attorney is often the difference between recoverable evidence and a case built on guesswork.

What changed about Louisiana's comparative fault rule in 2026?

Effective January 1, 2026, Louisiana Civil Code article 2323 was amended by Act 15 of 2025. An injured person found 51 percent or more at fault now recovers nothing, not a reduced amount, nothing at all. Previously, an injured person could recover damages reduced by their percentage of fault even if they were more than half at fault. This makes every statement at the crash scene, every detail in the police report, and every piece of evidence about how the wreck happened far more consequential than it used to be.

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How Bateman McDonald approaches commercial truck cases

Other lawyers refer their toughest commercial vehicle and offshore cases to our firm because we are built to try them. David Bateman has spent roughly three decades in Louisiana courtrooms. Michael McDonald handles the maritime and complex-injury work alongside him. When you call us, you talk to a lawyer, not a case manager, not an intake screener, and you stay in contact with that lawyer through the life of the case.

If an 18-wheeler has hit you or someone in your family, the first call you make matters. Consultations are free and there is no fee unless we recover for you.

Bateman McDonald Law Firm

6700 Jefferson Highway, Building 3 Baton Rouge, LA 70806

(225) 766-8484 · BatemanMcDonaldLaw.com

This article is provided for general information only and is not legal advice. Every case turns on its specific facts. Reading this material does not create an attorney–client relationship with Bateman McDonald Law Firm. If you have been injured, please contact a Louisiana personal injury attorney to discuss your situation.