The First 72 Hours
Commercial-vehicle evidence preservation, scene investigation, and early litigation decisions.
Commercial trucking litigation is not ordinary automobile litigation with a larger vehicle. It involves a federal regulatory framework, specialized evidence sources, multiple potential parties, and a different investigative posture. Some of the case's most consequential decisions may be made in the hours immediately following the collision.
This article is for lawyers who may refer or co-counsel a commercial-vehicle case. The Rule of Three for the first 72 hours is: preserve the evidence, investigate the scene, and make the early legal decisions that protect the client's rights.
The Critical Window: Why Hours Matter
Commercial-vehicle evidence can be unusually fragile or distributed across several custodians. Dash-camera footage may be subject to short overwrite cycles. Telematics may be held by a third-party vendor. Electronic control module or event data can be affected by later operation, repair, or another event. Roadway marks and debris can disappear through weather and cleanup.
Federal regulations establish minimum retention periods for certain records, but those periods are not a substitute for a case-specific preservation plan. For example, motor carriers generally must retain records of duty status and supporting documents for at least six months under 49 C.F.R. § 395.8(k). Other evidence may be governed by different regulations, company policies, vendor settings, or no fixed retention rule at all.
Do not wait for a complete police report to begin identifying evidence custodians. The better first question is: What evidence may change or disappear, who controls it, and what lawful step can preserve it now?
The Three Pillars of the First 72 Hours
1. Evidence Preservation
A targeted preservation demand—sometimes accompanied by a litigation-hold notice—puts the recipients on notice of anticipated litigation and identifies the evidence that should be preserved. The duty to preserve depends on the applicable law and when litigation was reasonably anticipated; a letter is important evidence of notice, but it should not be described as automatically creating every preservation obligation by itself.
A case-specific preservation demand may address:
- ECM/EDR data and raw source files, including available speed, throttle, brake, diagnostic, and event information
- Forward-facing and in-cab video, together with platform logs, metadata, and original-format files
- GPS and telematics, including route, position, speed, and event data
- Electronic logging device data and records of duty status
- Dispatch communications, texts, call logs, load information, and trip-planning records
- Maintenance, inspection, and repair records for the tractor, trailer, and relevant components
- Driver qualification and training materials, subject to applicable privacy and discovery rules
- Post-crash inspections, photographs, measurements, testing, and downloads performed by the carrier, insurer, investigator, or vendor
- Third-party vendor data for video, telematics, dispatch, maintenance, or fleet management
- Required post-accident drug and alcohol testing records
Send the demand to the correct custodians, not merely the driver or a claims adjuster. Consider the carrier, owner, lessee, insurer, broker, shipper, maintenance provider, towing and storage facilities, technology vendors, and any other entity that may control relevant evidence.
If evidence is destroyed after a preservation duty arose, the available remedy depends on the governing law, the culpability involved, the evidence's relevance, and resulting prejudice. Possible remedies can include additional discovery, exclusion, an adverse inference, monetary sanctions, or other relief. Avoid promising a particular sanction before the facts and controlling standard are known.
2. Scene Investigation and Documentation
The second pillar is securing the physical and testimonial evidence that may not exist later.
Visit the scene promptly. Document roadway geometry, sight lines, lighting, traffic controls, grades, construction, tire marks, gouges, debris, and other relevant conditions. Obtain permission before entering private property.
Use appropriate documentation methods. Ground photography, video, measurements, drone imagery where lawful, survey equipment, and 3D scanning can preserve distances, angles, and impact locations. Match the method to the case rather than collecting technology for its own sake.
Arrange a lawful vehicle inspection. Seek an agreed inspection protocol or court relief when needed. Preserve the truck, trailer, cargo, components, and the client's vehicle against destructive testing, repair, alteration, or disposal until the parties can inspect appropriately.
Interview witnesses. Start with crash and emergency-response reports, but do not assume they identify everyone. Witnesses may possess photographs, video, dash-camera recordings, or observations that never reached law enforcement.
Maintain chain of custody. Record when, where, how, and by whom physical or electronic evidence was collected, transferred, imaged, downloaded, or stored. Preserve originals and document working copies.
3. Early Legal Decisions
Engage the right experts. An accident reconstructionist, trucking-safety specialist, digital-forensics professional, mechanical engineer, human-factors expert, or other specialist may need early access to evidence. Define the assignment carefully and expect the expert to document methods, assumptions, and limitations.
Evaluate emergency court relief. If a vehicle, component, or data source faces imminent alteration or destruction, consider whether an agreed preservation order, expedited inspection, temporary restraining order, or other relief is supported by the facts and governing procedure. The objective is a fair preservation and inspection process—not preventing the opposing party from performing its own legitimate investigation.
Understand post-accident testing. Under 49 C.F.R. § 382.303, an employer must conduct post-accident alcohol and controlled-substances testing for a surviving commercial driver after a fatal crash. For a crash involving immediate medical treatment away from the scene or disabling damage requiring a tow, testing under that section generally depends on whether the driver received a qualifying moving-violation citation within the regulation's time window. Preserve both the results and records explaining why required testing was delayed or not completed.
Identify additional parties and claims. Depending on the evidence and governing law, potential parties may include the motor carrier, vehicle owner, broker, shipper, maintenance provider, loading entity, component manufacturer, or another contractor. In Montgomery v. Caribe Transport II, LLC, 608 U.S. 219 (2026), the U.S. Supreme Court held that the FAAAA did not preempt the negligent-hiring claim against the freight broker at issue because the statute's motor-vehicle-safety exception applied. That decision resolves the federal preemption question addressed there; it does not eliminate the need to prove the elements of a viable state-law claim against a particular broker.
The Consequences of Delay
Formal discovery can compel production of relevant data and records, but discovery cannot restore evidence that no longer exists. A prompt, specific preservation process also helps distinguish routine retention practices from destruction occurring after a duty to preserve arose.
Early investigation also improves decision-making. It may identify a mechanical issue, disprove an initial theory, reveal another responsible party, or show that a claim should not be pursued. The goal is not merely to gather evidence favorable to the client; it is to understand what happened while the best sources remain available.
Why Local Counsel Matters
In a Mississippi or Alabama commercial-vehicle case, local counsel can add practical speed and jurisdiction-specific knowledge during the preservation window.
Local investigative resources. Counsel familiar with the area can help locate qualified investigators and experts, identify towing or storage facilities, and navigate requests to local agencies.
Local procedure. Familiarity with filing practices, emergency-motion requirements, court rules, and available remedies can matter when preservation relief is time-sensitive.
State-law differences. Mississippi and Alabama do not apply identical fault rules. Alabama's contributory-negligence framework can make evidence concerning each party's conduct especially important. Every case still requires analysis of the particular claims, defenses, exceptions, and evidence.
Coordinated case support. Local counsel can assist with inspections, witnesses, hearings, discovery, experts, and trial preparation while preserving the referring lawyer's role and client relationship.
Conclusion
The first 72 hours after a commercial-vehicle collision can shape the evidence available for the entire case. Data may be overwritten. Vehicles may be repaired. Scene conditions may change. Witnesses may become difficult to locate.
The Rule of Three provides a practical response: preserve the evidence, investigate the scene, and make the early legal decisions that protect the client's rights. When a lawyer is unsure whether the necessary time, funding, expertise, or local resources are available, an early referral or co-counsel consultation is usually more valuable than a late one.
Important: This article provides general educational information for lawyers. It is not legal advice and is not a substitute for researching the current statutes, regulations, rules, preservation standards, deadlines, and ethical duties governing a particular matter.