Discovery in Kentucky Truck Accident Litigation

What Discovery Means in a Truck Accident Case

Discovery is the formal stage of a lawsuit where both sides must share evidence. In a standard car accident case, discovery is usually straightforward: the police report, medical records, and insurance policy limits. In a truck accident case, discovery is far more involved.

Trucking companies are regulated by the Federal Motor Carrier Safety Administration (FMCSA). That means they are required to create and keep dozens of document types that ordinary drivers never generate. Electronic logs. Drug test results. Maintenance files. Driver qualification records. Pre-trip and post-trip inspection reports. Dispatch communications. Onboard camera footage.

These records tell the story of what really happened before the crash. They reveal whether the driver was over their legal hours. Whether the truck had brake defects that went unfixed. Whether the company knew about a pattern of safety violations and did nothing. Discovery is how we get those records into our hands and into the courtroom. For a broader look at the truck accident case process, see our truck crash case guide.

Kentucky’s Rules of Civil Procedure (CR 26 through CR 37) govern the discovery process in state court. In federal court, the Federal Rules of Civil Procedure apply. Both systems allow subpoenas for documents, depositions of witnesses, physical inspections of vehicles and crash sites, written questions (interrogatories), and requests for admission.

Document Subpoenas: What We Demand in Every Truck Case

The foundation of discovery in a truck accident case is the document subpoena. We send targeted written demands to the trucking company, the driver, the insurer, and any third party that may hold relevant records. Every request is built around federal regulations that require these documents to exist.

Electronic Logging Device (ELD) Data

Since December 2017, the FMCSA ELD mandate has required most commercial motor vehicles to use electronic logging devices that automatically record driving time, engine hours, vehicle movement, and miles driven. ELD data is the most direct evidence of hours-of-service violations.

Under 49 CFR Part 395, drivers are limited to 11 hours of driving after 10 consecutive hours off duty, with a 14-hour on-duty window. If the ELD data shows the driver had been on the road for 13 straight hours before the crash, that is direct evidence of a federal regulation violation. Our page on hours-of-service violations in truck crashes covers how we use this data to prove liability.

ELD records also reveal whether the device was tampered with, disconnected, or set to “unassigned driving time” to hide hours. We subpoena both the raw ELD data files and the carrier’s ELD system audit logs to identify any manipulation.

Driver Qualification Files

Every trucking company must maintain a driver qualification file under 49 CFR Part 391 for each driver it employs. These files contain the driver’s employment application, road test certificate, annual review of driving record, medical examiner’s certificate, motor vehicle record (MVR) from each state where the driver holds a license, and previous employer verifications for the prior three years.

We subpoena the complete driver qualification file because it often reveals red flags the company ignored: prior crashes, moving violations, license suspensions, falsified employment history, or an expired medical certificate. If the company hired or retained a driver with a dangerous record, that is evidence of negligent hiring or negligent retention under Kentucky law.

Maintenance and Inspection Records

Under 49 CFR Part 396, carriers must systematically inspect, repair, and maintain every commercial motor vehicle they operate. They must also keep records of every inspection, maintenance action, and repair for at least one year and for 30 days after the vehicle leaves their control.

We demand the full maintenance file for the truck involved in the crash, plus pre-trip and post-trip driver vehicle inspection reports (DVIRs) for the 90 days leading up to the crash. Brake defects, tire wear, lighting failures, coupling issues, and steering problems are all documented in these records. If the company knew about a defect and failed to repair it, or if it falsified inspection reports, the maintenance records are the proof.

We also subpoena Commercial Vehicle Safety Alliance (CVSA) inspection reports and any roadside inspection results from the FMCSA’s Safety Measurement System (SMS) database.

Dispatch and Communication Records

Dispatch logs, load assignments, routing instructions, and electronic communications between the driver and the carrier are critical in truck accident cases. These records show whether the company pressured the driver to meet unrealistic delivery deadlines, whether the driver reported fatigue or mechanical issues and was told to keep driving, and whether the planned route was safe for the size and weight of the vehicle.

Modern trucking companies use fleet management systems like PeopleNet, Omnitracs, or Samsara that log GPS position, speed, hard braking events, and communication messages. We subpoena the raw data exports from these platforms, not just the summary reports the carrier chooses to share.

Drug and Alcohol Testing Records

Under 49 CFR Part 382, commercial motor vehicle drivers are subject to mandatory drug and alcohol testing: pre-employment, random, post-accident, cause-based suspicion, return-to-duty, and follow-up. A post-accident test is required when the crash involves a fatality or when the driver receives a citation and someone is transported for medical treatment.

We subpoena the complete testing history from the carrier’s designated testing facility and the Department of Transportation (DOT) drug and alcohol testing records. If the driver tested positive for controlled substances, or if the company failed to conduct required testing, that evidence is central to proving negligence.

Depositions in Truck Accident Cases

A deposition is sworn, recorded testimony taken before trial. The witness answers questions under oath, and a court reporter creates an official transcript. Under Kentucky CR 30, any party may take depositions of parties and non-party witnesses. Depositions lock in testimony so the witness cannot change their story at trial.

In a truck accident case, depositions are where we pin down the details that documents alone cannot provide. We typically depose the following individuals:

The truck driver. We ask about the hours they drove before the crash, their rest stops, distractions, cell phone use, whether dispatch pressured them to keep driving, their familiarity with the route, the condition of the truck, and any mechanical issues they noticed before the crash.

The safety director or compliance officer. This person is responsible for the carrier’s compliance with FMCSA regulations. We ask about the company’s hiring process, driver training programs, ELD monitoring practices, drug testing protocols, and how the company responds to safety violations. If the company has a pattern of violations in the FMCSA’s SMS database, we ask the safety director to explain every one of them.

The dispatcher. Dispatchers assign loads, set delivery windows, and communicate with drivers in real time. If the dispatcher knew the driver was fatigued, running over hours, or dealing with a mechanical problem and still told the driver to deliver on time, the company has direct liability for the crash.

The corporate representative (30(b)(6) or CR 30.02(6) witness). Under Kentucky’s rules, we can require the company to designate a witness to testify on specific topics: company policies, training procedures, safety records, insurance coverage, and what the company knew about the driver’s record before the crash. The corporate representative testifies on behalf of the entire company, not just themselves.

Third-party witnesses. Depending on the case, we may depose the cargo loading company, the maintenance provider, the truck or trailer leasing company, or the freight broker. Each of these parties may share liability for the crash. Our dedicated trucking and commercial vehicle team handles every stage of this process.

Vehicle and Scene Inspections

Discovery is not limited to paper records and testimony. Under Kentucky CR 34, we can demand physical inspections of the truck, the trailer, the cargo, and the crash scene itself.

Event Data Recorder (EDR) and Engine Control Module (ECM) Downloads

Modern commercial trucks are equipped with event data recorders (EDRs) and engine control modules (ECMs) that capture speed, braking force, throttle position, cruise control status, ABS activation, and other data points in the seconds before and during a collision. The National Highway Traffic Safety Administration (NHTSA) has recognized EDR data as a primary source of objective crash evidence.

We retain certified technicians who download the raw data from the truck’s ECM using manufacturer-specific tools. This data is time-stamped and tamper-resistant, and it often contradicts what the driver or the carrier claims happened. If the trucking company says the driver was traveling at 55 mph and the ECM shows 72 mph, the ECM data controls.

Physical Vehicle Inspection

We send an accident reconstruction team to inspect the truck and trailer, measuring tire tread depth, brake pad thickness, coupling integrity, lighting function, and structural damage. Brake deficiencies are the single most common mechanical violation found in CVSA International Roadcheck inspections. If the truck involved in your crash had worn brake pads, out-of-adjustment brakes, or air system leaks, the inspection documents those conditions before the trucking company can repair the vehicle. Learn more about how trucking companies respond to crashes on our trucking company tactics page.

Scene Documentation

We secure DOT and TriMarc camera footage from the Kentucky Transportation Cabinet. Sam Aguiar Injury Lawyers has exclusive access to statewide DOT and TriMarc camera archives dating back six months. We also obtain footage from nearby businesses, traffic cameras, and dashcam recordings from other vehicles in the area. Crash scene evidence includes skid marks, gouge marks, debris fields, and final rest positions of all vehicles. Our reconstruction team maps these details using laser scanning and drone photography.

Interrogatories and Requests for Admission

In addition to document subpoenas and depositions, Kentucky’s discovery rules provide two written tools that are essential in truck accident cases.

Interrogatories are written questions that the other party must answer under oath. Under Kentucky CR 33, we can serve interrogatories on the trucking company and the driver. We use interrogatories to identify every insurance policy that covers the truck, learn the identity of every person involved in dispatching and supervising the driver, confirm the identity of the vehicle owner, leasing company, and maintenance provider, and establish the chain of custody for all electronic data.

Requests for admission require the other party to admit or deny specific facts. Under Kentucky CR 36, any fact that is admitted is established for the rest of the case. We use requests for admission to lock down undisputed facts early: that the driver was employed by the carrier, that the truck was being operated within the scope of employment, that specific FMCSA regulations applied to the vehicle, and that the carrier received the spoliation preservation letter. If the other side fails to respond within 30 days, every request is deemed admitted.

How Our Trucking Team Uses Discovery to Build Your Case

Discovery is not a checklist. It is a strategy. Every subpoena, deposition question, and inspection request is designed to build a specific theory of liability and damages. Our dedicated trucking team handles discovery differently from a general practice firm because truck accident cases demand a different level of knowledge and resources.

We send spoliation preservation letters within hours. Before the trucking company can destroy, overwrite, or “routinely purge” any records, we send a formal letter demanding that all evidence be preserved. This letter puts the carrier on legal notice that destroying evidence will result in sanctions and adverse inference instructions at trial.

We know exactly what to subpoena. The FMCSA regulatory framework requires dozens of specific document types. A firm that does not handle truck accident cases regularly may not know to demand the carrier’s CSA BASIC scores, the driver’s pre-employment screening program (PSP) report, or the ELD system audit logs. Missing one category of records can mean missing the strongest evidence in the case. See our truck accident attorneys page to learn more about our team’s FMCSA regulatory knowledge.

We depose the right people in the right order. We start with the driver, then move to the safety director, then the corporate representative. Each deposition builds on the prior one. By the time we get to the corporate witness, we already know the answers. We are not asking questions to learn. We are asking questions to lock in testimony under oath.

We bring reconstruction and engineering resources to every inspection. Our team includes accident reconstructionists, biomechanical engineers, and certified ECM download technicians. When we inspect the truck, we do not just look at the exterior damage. We download the event data, measure the mechanical systems, and document every condition that contributed to the crash.

We use discovery to calculate full damages. Beyond liability, discovery uncovers the data needed to prove the full value of your case. We subpoena the carrier’s insurance policies to identify all available coverage layers. We take depositions of treating physicians to establish the long-term impact of your injuries. We retain life care planners and economists to project future medical costs and lost earning capacity.