A truck’s electronic records can disappear long before an injured person finishes medical treatment or receives a police report. Scene photographs matter, but they don’t capture every source of proof, particularly the onboard data, inspection materials, and internal records controlled by the trucking company. Knowing what to preserve, and how fast the clock runs, can determine what evidence is still available when it’s needed most.

At Guerriero & Guerriero, we’ve handled commercial truck cases across four generations of family legal practice, totaling more than 100 years of combined experience. We know that protecting evidence after a truck crash often requires two simultaneous efforts: securing what’s in your possession and promptly identifying records held by others before they’re overwritten or destroyed.

Start with Safety & Immediate Documentation

Get medical care and call 911 before attempting to document a collision. Louisiana Revised Statutes 32:398 addresses crashes involving injury, death, or property damage exceeding $500, but a police report is only one piece of the available evidence.

If it’s safe to do so, take photographs and video before vehicles are moved, debris is cleared, or weather conditions change. The evidence worth capturing at a truck accident scene includes the roadway, traffic controls, skid marks, damaged guardrails, debris fields, vehicle positions, visible injuries, and the truck’s license plate, USDOT number, trailer number, and company markings.

Document these details when possible:

Scene Conditions: Photograph weather, lighting, road surfaces, construction zones, lane markings, and traffic signals.
Vehicle Damage: Capture wide views and close images of every damaged area, including the truck, trailer, passenger vehicle, and damaged personal property.
Witness Information: Record names, phone numbers, and email addresses before witnesses leave the scene.
Personal Recollection: Write down what you saw, heard, and felt as soon as you can, including the direction each vehicle traveled.
Communications: Keep copies of all communications with insurers, law enforcement, medical providers, and towing companies.

Don’t rely on memory alone. A dated note can preserve details a police report won’t. The truck driver’s statements, when emergency responders arrived, or whether a traffic signal appeared to be working are details that often go unrecorded.

Preserve Your Vehicle, Belongings & Medical Evidence

Don’t authorize repairs, release your vehicle for salvage, or discard damaged belongings until they’ve been thoroughly photographed and, when appropriate, inspected. The condition of a crushed door, deployed airbag, child restraint, torn clothing, or broken glasses can help explain the force and circumstances of the impact.

Keep original photographs and video files whenever possible. Screenshots and edited clips may be useful for sharing, but original files contain date, time, and location metadata that helps establish when an image was created. Back up digital evidence to a secure cloud folder or external drive rather than leaving the only copy on a damaged phone.

Medical & Wage Loss Documentation

Medical documentation should begin with emergency care and continue through follow-up treatment. Save discharge instructions, prescriptions, test results, invoices, appointment records, mileage logs for medical visits, and receipts for items connected to your care.

Maintain a simple symptom timeline with dates, treatment changes, missed activities, and work restrictions. For lost income, keep pay stubs, missed work notices, relevant tax records, and written documentation from your employer showing missed hours or changed duties.

Your Damaged Vehicle

Your vehicle may be important physical evidence, not just property awaiting repair. Before it’s repaired or salvaged, photographs and an inspection can document impact points, restraint system deployment, seat position, and mechanical condition. An event data recorder (sometimes called a vehicle’s “black box”) may also retain data such as speed, braking, steering, or seat belt use, depending on the vehicle and system involved.

Know Which Trucking Records May Matter

Commercial truck collisions can involve evidence that isn’t available to the public at the crash scene. A trucking company, truck owner, maintenance provider, cargo company, broker, or insurer may control records showing how the trip was planned, how the vehicle was operated, and whether the truck was properly maintained before the crash.

Important carrier-controlled evidence may include:

Electronic Logging Device Data: An electronic logging device records a driver’s duty status and can show hours of service, driving time, rest periods, and location history.
Electronic Control Module Data: This vehicle computer may retain information about speed, braking, throttle position, or fault codes at the time of the crash.
Driver Qualification File: This file may contain records related to the driver’s licensing, training, medical certification, and driving history.
Dispatch & GPS Records: These materials may show route instructions, delivery schedules, location history, communications, and timing pressures placed on the driver.
Vehicle Maintenance Records: Inspection reports, repair orders, tire records, brake records, and maintenance logs can reveal the truck’s condition before the crash.
Cargo & Bill of Lading Records: Cargo records can identify what was being transported, who loaded it, the shipment weight, and any handling instructions.
Post-Crash Materials: Inspection reports, photographs, internal investigation documents, and drug or alcohol testing records may exist where applicable.

Federal safety regulations generally require motor carriers to retain electronic logging device records and supporting documents for six months. That’s a minimum retention floor, not a certainty that every relevant record will still exist when a claim is resolved. Video, onboard data, text messages, and other digital material may be overwritten on a shorter schedule, sometimes within days.

Request Preservation Before Evidence Disappears

A preservation letter (also called a spoliation letter) is a written notice asking a person or organization to retain potentially relevant evidence. Spoliation refers to the loss, destruction, alteration, or failure to preserve evidence that may matter in a legal claim.

For a truck crash in Ouachita Parish, a preservation request may need to reach more than the trucking company. Depending on the facts, potential record holders can include the driver, truck owner, trailer owner, insurer, maintenance provider, cargo loader, broker, or another business connected to the shipment.

A preservation request may identify:

The Truck & Trailer: The vehicles, components, tires, brakes, cargo securement equipment, and post-crash condition.
Onboard Information: Electronic logging device data, electronic control module data, GPS records, dash camera footage, and communications systems.
Driver Materials: Hours of service records, qualification records, training records, and dispatch instructions.
Company Files: Maintenance records, inspection reports, cargo documents, hiring materials, and internal investigation materials.
Digital Communications: Text messages, emails, dispatch messages, call records, photographs, and video connected to the crash.

A letter alone doesn’t replace a full investigation. If voluntary preservation is uncertain, our attorneys may need to pursue vehicle inspection, subpoenas, formal discovery, or court relief to secure evidence and determine what happened.

Build an Evidence File & Avoid Common Mistakes

Create one folder (physical or digital) for all crash-related material. Use clear filenames with dates, such as “October 20, 2026 emergency room discharge” or “October 22, 2026 vehicle damage driver side,” and maintain a running timeline of important events.

Keep these items together:

Crash Information: Police report details, photographs, videos, witness contacts, and personal notes.
Insurance Materials: Claim numbers, letters, emails, adjuster information, and settlement documents.
Medical Records: Bills, treatment notes, prescriptions, test results, and appointment logs.
Financial Documentation: Wage loss records, repair estimates, towing invoices, rental receipts, and out-of-pocket costs.
Correspondence: Messages with employers, medical providers, witnesses, insurers, and other parties connected to the collision.

Don’t give a recorded statement or sign a release before you understand what information may still be missing. Don’t post detailed accounts, photographs, or recovery updates publicly, and don’t delete messages, photos, or social media content that could relate to the collision.

Louisiana generally provides a two-year prescriptive period for delictual actions arising after July 1, 2024. That deadline isn’t an evidence preservation deadline. Waiting months because a claim appears to have time remaining can put trucking records, vehicle data, and witness recollections at risk.

Act While the Evidence Can Still Be Found

The most valuable evidence after a truck crash is often what can’t be recreated later: the damaged vehicles, original photos, prompt medical records, eyewitness accounts, and carrier-controlled electronic data. Medical recovery should remain the priority, but you don’t need every document in hand before asking for help with preservation.

If you or someone you care for was injured in a truck crash in Ouachita Parish, Morehouse Parish, or Richland Parish, our attorneys at Guerriero & Guerriero are ready to help identify and secure the evidence that matters. Call us at (318) 600-0000.

Evidence To Preserve After A Truck Accident