Preserving Evidence After a Colorado Truck Crash
Key Takeaways
- Federal regulation 49 CFR 395.8(k)(1) requires motor carriers to retain records of duty status and supporting documents for six months from the date of receipt. After that, destruction is lawful.
- Colorado gives three years to file most motor vehicle personal injury claims, but the evidence that proves a truck case can lawfully disappear in month seven.
- A written preservation letter, sent to the carrier and its insurer, is what stops the clock on destruction.
- Physical evidence carries its own deadline. A repaired or salvaged tractor cannot be inspected for brake condition, tire wear, or lighting failure.
- There is evidence an injured person controls too, including photographs, medical documentation, and a record of how the injury has affected daily life.
Why does evidence disappear so quickly in truck cases?
Evidence disappears quickly in truck cases because federal retention periods are short and the vehicle is a working asset the carrier wants back on the road. Neither of those pressures exists in an ordinary two-car collision.
The clearest example is the duty log. Under 49 CFR 395.8(k)(1), a motor carrier must retain records of duty status and supporting documents for not less than six months from the date of receipt. That is a floor, not a ceiling, and many carriers keep records longer. But a carrier that destroys them at the six-month mark has done nothing wrong under the regulation.
Compare that to the filing deadline. Colorado allows three years to bring most personal injury claims arising from the use or operation of a motor vehicle under C.R.S. 13-80-101(1)(n). An injured person who takes a year to decide whether to pursue a claim may find the proof gone while the deadline is still eighteen months away.
What records matter in a truck crash claim?
The records that matter are the ones that reconstruct what the driver and the carrier were doing before the crash, not just what happened at the moment of impact.
Duty and hours records. Electronic logging device files establish how long the driver had been working, which is the foundation of any truck driver fatigue and hours of service violation claim.
Supporting documents. Federal rules define these to include bills of lading, dispatch records, trip reports, fuel purchase receipts, toll records, and driver communications. They corroborate or contradict the log, and their independence from the carrier’s own paperwork is what makes them valuable.
Vehicle data. The engine control module records speed, throttle, and braking. Our guide on what truck black box and ELD data shows after a crash explains what those systems capture.
Maintenance and inspection files. These show whether a known defect went unrepaired, which moves a claim from driver error toward carrier negligence.
Driver qualification files. Employment history, license status, medical certification, and prior violations speak to negligent hiring and retention.
Drug and alcohol testing records. Federal rules require post-accident testing in defined circumstances, and the presence or absence of a test is itself informative.
Each of these categories expands who is liable in a truck accident besides the driver, which matters because the carrier’s insurance is usually far larger than the driver’s.
What is a preservation letter and what does it do?
A preservation letter is a written demand sent to the motor carrier and its insurer identifying the specific evidence they must not destroy, alter, or return to service. It converts routine record disposal into a deliberate act with legal consequences.
An effective letter is specific rather than general. It typically identifies:
- The crash by date, location, unit number, and driver
- Electronic logging device data and any back-up copies
- Engine control module and telematics data, with a demand that the module not be read or reset before a joint download
- In-cab and forward-facing camera footage
- Dispatch messages, bills of lading, fuel and toll records
- Maintenance, inspection, and repair records for the tractor and trailer
- The driver qualification file and post-accident testing results
- The tractor, trailer, and cargo themselves, held in their post-crash condition pending inspection
Federal regulation also prohibits obscuring, defacing, destroying, mutilating, or altering information in a supporting document. That prohibition exists independently of any letter, but a preservation demand makes the carrier’s knowledge of the claim undeniable.
Why does the truck itself need to be inspected?
Because several negligence theories can only be proven by looking at the vehicle, and the window closes as soon as the carrier repairs, sells, or scraps it.
A physical inspection can establish brake adjustment and lining condition, tire tread depth and inflation, lighting and reflector function, trailer coupling condition, and whether the load was secured according to federal cargo rules. In Colorado it can also establish whether the vehicle carried required traction devices, which connects to Colorado chain law violations and truck crash liability.
Brake condition deserves particular attention in Colorado. CDOT’s Truck Safety Campaign fact sheet notes that long descending grades can drive vehicle speeds up and cause heavy truck brakes to overheat and fail through extensive use, and that runaway truck ramps see their heaviest use in summer. A truck that was repaired before inspection takes the answer with it, which is a recurring problem in brake failure and runaway truck ramp crashes in Colorado.
What evidence can an injured person preserve on their own?
More than most people realize, and it starts at the scene when possible. An injured person who is able to document what happened creates a record no carrier can quietly retire.
- Photograph the identifiers. The USDOT number, motor carrier name, trailer markings, and license plates on both the tractor and the trailer. These are how the correct defendant is identified weeks later.
- Photograph the scene. Vehicle positions, debris, skid marks, road conditions, signage, and weather. Our checklist on what photos to take after a crash covers the shots that hold up.
- Collect witness contact information. Witnesses scatter and become unfindable within days.
- Get the police report. Our guide on how to get a copy of a Denver police accident report walks through the process.
- Seek medical care immediately and keep every record. Gaps in treatment are the most common argument used to discount an injury.
- Keep a written record of daily limitations. Contemporaneous notes about pain, sleep, missed work, and activities you can no longer do carry real weight in valuing a claim.
The broader sequence of steps is covered in our Colorado crash checklist.
Should you give a statement to the trucking company’s insurer?
Not before speaking with a lawyer. A recorded statement taken while an injured person is medicated, in pain, or still learning the extent of their injuries becomes a permanent document that defense counsel will use for years.
The risk is not that an injured person will lie. It is that they will minimize. Saying “I’m okay” in the first week, before a brain injury or a disc herniation has declared itself, gives the insurer a quote to read back at deposition. Our article on how insurance adjusters decide what your claim is worth covers how early statements factor into valuation.
Commercial carriers move quickly on this. Many deploy an investigator to the scene within hours, and the request for a statement often arrives before the injured person has left the hospital.
Does preservation work differently for government vehicles?
The preservation strategy is the same, but the deadline that governs everything else is much shorter. Under C.R.S. 24-10-109, an injured person must serve written notice of a claim on the correct public entity within 182 days of discovering the injury. Missing that deadline bars the claim entirely, no matter how well the evidence was preserved.
Public fleets, including plows, buses, and heavy maintenance equipment, run the same telematics as private carriers, and public records requests can sometimes reach material that private discovery cannot. The full framework is covered in injured by a government vehicle in Colorado and, for transit specifically, in RTD bus and public transit accident claims in Denver.
How does preservation affect the value of a personal injury claim?
Directly. A claim supported by engine data, duty logs, and a documented vehicle inspection is a claim the carrier’s insurer has to price against the risk of a verdict. A claim supported only by the injured person’s account is one the insurer can discount, because the proof problem belongs to the plaintiff.
Fault allocation makes this concrete. Under Colorado’s modified comparative negligence rule, an injured person who is found 50 percent or more at fault recovers nothing, and any award is reduced by their assigned percentage. Preserved evidence is what keeps that percentage from drifting upward on the strength of a defense theory nobody can disprove.
For the full picture of how these cases are built, see our overview of truck accident claims in Colorado.
Frequently Asked Questions
How long does a trucking company have to keep driver logs?
Federal regulation 49 CFR 395.8(k)(1) requires motor carriers to retain records of duty status and supporting documents for not less than six months from the date of receipt.
Can I send a preservation letter myself?
You can, but a general letter is easy to comply with narrowly. An effective demand identifies specific systems and records, and it carries more weight coming from counsel who is clearly prepared to litigate.
What happens if the trucking company destroys evidence anyway?
Destruction of relevant evidence after notice of a claim can become an issue in the litigation itself, separate from the underlying negligence question.
Is it too late if the crash happened months ago?
Not necessarily. Some records survive well past the minimum retention period, and other sources such as law enforcement files, medical records, and independent witnesses remain available. It is worth having the case reviewed rather than assuming the window has closed.
Do I have to file a lawsuit to preserve evidence?
No. A preservation demand is sent before any lawsuit is filed. Formal discovery follows later if the claim does not resolve.
Talk to a Denver truck accident lawyer
The six-month clock on a trucking company’s records starts the day of the crash. Chalat Hatten & Banker represents seriously injured people and their families throughout Colorado, and there is no fee unless we recover on your behalf. Schedule a free consultation.