Truck Accidents 7 min read
Trucking companies do not wait. Within hours of a serious 18-wheeler crash in Houston, a rapid response team of investigators, adjusters, and defense counsel is already at the scene taking measurements and photographing the roadway. Meanwhile, the evidence that proves your case, electronic logs, black box data, dash camera footage, and maintenance records, sits on systems with retention policies measured in days. This guide explains what disappears, how fast, and how a spoliation letter locks it down.
A commercial truck generates far more data than a passenger car. The engine control module records speed, throttle position, braking, and hard-brake events. Electronic logging devices track hours of service under the Federal Motor Carrier Safety Regulations. Many fleets run forward and driver-facing cameras, GPS telematics, and dispatch messaging systems.
Behind the truck sits a paper trail: driver qualification files, prior violations, drug and alcohol testing records, maintenance and inspection logs, bills of lading, and load securement documents. These records are how you prove the carrier itself was negligent in hiring, training, supervising, or maintaining, not just the driver.
Federal rules set minimum retention periods, and many carriers keep records exactly that long and no longer. Hours-of-service supporting documents must be retained for six months under 49 CFR Part 395. Driver investigation and inquiry records follow their own schedules. Dash camera systems commonly overwrite on a loop within seven to thirty days.
Black box data can be lost the moment the tractor is repaired, resold, or simply driven again, because some modules overwrite on ignition cycles. Third-party evidence is even more fragile. Gas station, warehouse, and traffic camera footage along Beltway 8, I-45, and the Grand Parkway is routinely recycled within a week.
This is the practical reason we tell families to call before they call the insurer. Every day of delay is potentially a permanently deleted file.
A spoliation letter, also called a litigation hold or evidence preservation letter, is written notice to the carrier, the driver, the insurer, and any third party that specific evidence must be preserved because litigation is anticipated. It should be specific, listing each category of data, each device, and each vehicle by unit number.
Once sent, destruction of that evidence carries consequences. Texas courts can impose spoliation remedies, including a jury instruction allowing the jury to presume the missing evidence would have been unfavorable to the party that destroyed it. That instruction can be worth more at trial than the data itself.
We pair the letter with a request to inspect the tractor and trailer before repairs, and when necessary, a temporary restraining order to prevent a vehicle from being released, repaired, or sold.
Get the CR-3 crash report number and the carrier's USDOT number from the police officer or the truck's door placard. Photograph the trailer number, the placards, and the company name before the vehicle is towed.
Do not authorize your own vehicle to be repaired or salvaged. It is evidence too. Keep all medical records, and write down the names of every responding agency.
Then get counsel involved immediately. The point of speed is not aggression, it is arithmetic: the carrier's team arrived within hours, and the only way to keep the playing field level is to send preservation demands before the retention clocks run out.
It varies by record type. Hours-of-service supporting documents must generally be kept six months under 49 CFR Part 395, while dash camera footage often overwrites in as little as seven days. Many records are destroyed the day retention expires.
It is formal written notice demanding that a trucking company preserve specific evidence because a claim is anticipated. If the company destroys evidence after receiving it, a Texas court can sanction the company or instruct the jury to assume the evidence was harmful to its case.
Generally no. Downloading an engine control module requires the vehicle owner's cooperation or a court order, plus a qualified technician using proprietary equipment. This is one of the first steps a truck accident attorney takes.
Within days, not weeks. Preservation letters, vehicle inspections, and requests for third-party camera footage all depend on acting before the underlying data is overwritten.