A serious truck crash happens. Within hours, sometimes before the injured person has even been treated at the hospital, a trucking company investigator is already standing at the scene.
That is not a coincidence. It is not the carrier checking in out of concern.
Large carriers send rapid-response teams to serious crashes as standard operating procedure. We’ve watched it happen the same way, case after case: while the injured person is still in an exam room, someone from the trucking company is already working the scene.
Understanding why matters. It changes how you should think about everything that happens in the days after the crash.
This article provides general legal information. Consult a licensed Illinois attorney for advice specific to your situation.
Carriers Are Required to Investigate Serious Accidents
There’s a legitimate reason carriers investigate. Federal law requires it.
Under 49 CFR 390.15, every motor carrier has to keep an accident register: a log of crashes involving a fatality, an injury serious enough to need treatment away from the scene, or property damage above a set dollar threshold. Carriers have to hold onto these records for three years and hand them over to federal or state officials on request.
That’s a real institutional duty. Trucking companies are required to document what happened and gather the facts.
The team that shows up to do that documenting is usually not one person. It’s an attorney, someone whose job is reconstructing how the crash happened, and a claims investigator working for the carrier’s insurer.
They photograph the scene. They pull the truck’s electronic data. They talk to witnesses. They document the physical evidence, thoroughly and fast.
None of that is improper. It’s competent, professional work.
Here’s where it gets uncomfortable: that same competent work serves the carrier’s legal defense just as much as it serves its regulatory compliance.
The Litigation Interest Behind the Investigation
A rapid-response team is not a neutral referee.
The carrier or its insurer puts the team together, directs it, and receives its findings. Everything that team documents gets written down in a way that supports the carrier’s account of the crash.
Here’s the flip side: evidence nobody on your side asks for in time can simply disappear.
This imbalance shapes truck accident cases more than almost anything else.
The carrier’s team shows up funded, organized, and already briefed on what to do. Meanwhile you’re in a hospital bed, and your family is trying to hold everything together.
By the time a lawyer is retained and starts digging, days or weeks have often gone by. Data gets overwritten. Rain washes away skid marks. Witnesses move on with their lives.
Whatever the carrier wrote down on day one becomes the starting point for the whole case. Sit with that for a second: the side that may be at fault got to write the first draft of what happened, uncontested, while you were still in a hospital gown.
Illinois Spoliation Law and the Duty to Preserve Evidence
Illinois doesn’t treat spoliation, the destruction or loss of evidence relevant to a legal claim, as its own standalone claim. It’s analyzed as a form of negligence, following the Illinois Supreme Court’s decision in Boyd v. Travelers Insurance Co., 166 Ill. 2d 188 (1995): a party who owed a duty to preserve evidence, breached it, and thereby cost the other side the ability to prove their case, can be held responsible.
Beyond that negligence theory, a court also has its own tools. In Shimanovsky v. General Motors Corp., 181 Ill. 2d 112 (1998), the Illinois Supreme Court addressed sanctions for destroying evidence relevant to anticipated litigation, real consequences that can range from evidentiary penalties to dismissal or a default judgment.
The standard the court set is straightforward. The duty to preserve evidence kicks in once a party knows, or reasonably should know, that the evidence matters to litigation that’s coming.
Think about what it means when a carrier sends a rapid-response team to your crash scene within hours.
It’s hard for that carrier to later claim it didn’t see litigation coming. The team’s presence is the proof.
That means the duty to preserve everything relevant, electronic logging device data, ELD records, maintenance logs, driver qualification files, dispatch communications, and dashcam footage, attaches immediately. Not eventually. Immediately.
If any of that gets destroyed, altered, or quietly overwritten after the duty attaches, the carrier is exposed to significant legal consequences in Illinois courts.
What a Preservation Letter Does and Why Timing Matters
A preservation letter is exactly what it sounds like: a formal written demand from your attorney to the trucking company and its insurer.
It spells out precisely what has to be retained and puts everyone on notice that destroying or overwriting it is not an option. It typically points to the carrier’s existing duty under federal regulations, the Illinois spoliation doctrine from Shimanovsky, and the civil claim that’s coming.
It goes out to the carrier, the driver, the insurer, and any third-party maintenance provider that might be holding inspection records.
Here’s why the timing matters so much. Electronic logging device data is often stored on a rolling basis. If the truck stays in service, it can be overwritten within days.
Dashcam footage on a continuous-loop system can be gone in 24 to 72 hours.
A preservation letter creates a clear, dated record that the carrier knew exactly what it had to hold onto. After that letter goes out, it gets much harder for a carrier to explain away a lost hard drive as an innocent accident.
In our experience, understanding truck accident liability starts here. Preserving evidence is often the single most time-sensitive step in the entire case.
What Evidence Your Attorney Will Seek to Preserve
A preservation letter covers a lot more than the black box.
In a truck accident case, it typically demands the driver’s hours-of-service logs for the 30 days before the crash. The driver’s qualification file: drug and alcohol testing records, medical certificates, training history. Every vehicle inspection and maintenance record required under 49 CFR Part 396. Dispatch communications with the driver from the day of the crash. The carrier’s accident register under 49 CFR 390.15. Dashcam and telematics footage. Even the photos the carrier’s own response team took at the scene.
That breadth is the difference between a case built on real facts and one built on whatever happened to survive.
The carrier’s team is already collecting all of it, for the carrier’s benefit. A preservation letter is what stops that material from being selectively kept or quietly thrown away.
Talk to a Chicago Attorney: Free Consultation
If you or a family member has been harmed, the attorneys at Phillips Law Offices are ready to help. Call (312) 346-4262 or contact us online for a free, no-obligation consultation.
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