Post-Crash Evidence Preservation Checklist
Time-sensitive commercial vehicle records disappear quickly after a crash. This checklist is built for attorneys who need to know what to secure, why it matters, and how long carriers are required to keep it.
The first hours and days after a commercial vehicle crash determine what evidence will still exist when discovery begins. Carriers are required to retain some records for limited periods. Other records, particularly event data and video, are stored on devices that overwrite themselves on fixed cycles. Knowing the difference is what separates a complete record from a case built on incomplete assumptions. Bill Collins developed this checklist from 28 years as an FMCSA instructor and from firsthand experience with carrier record-keeping practices, fleet management systems, and the operational realities that determine whether evidence survives.
1. Secure the ELD Data Immediately
The Electronic Logging Device rule under 49 CFR 395.30 requires motor carriers to retain ELD data for six months. That sounds like a generous window, but it is not. Six months is the minimum retention period, and it applies only to the data the carrier has chosen to retain in its normal course of business. If the carrier disputes which system was active, whether edits were made, or whether unassigned driving events were properly reconciled, the raw output must be preserved before questions arise about chain of custody. Request the original ELD file, the driver profile, the vehicle unit assignment history, and the edit log with annotations. Do not accept a printed PDF as a substitute for the underlying electronic record.
2. Preserve Dashcam and Inward-Facing Video
Dashcam systems vary widely in storage capacity and overwrite behavior. Some units retain footage for only a few days before recording over older files. Others store video in a cloud portal that the carrier can manage, delete, or configure. Forward-facing video shows the approach to the crash, the traffic environment, and the behavior of other vehicles. Inward-facing video may show driver attention, fatigue indicators, or phone use. Both are relevant, and both can be lost if the preservation letter does not specifically name the systems in use and require the carrier to suspend automatic deletion. Identify the camera manufacturer and the fleet management platform as early as possible.
3. Download the ECM or Black Box Before It Overwrites
The Engine Control Module records hard braking events, sudden deceleration, cruise control status, throttle percentage, engine RPM, and fault codes. Many ECMs retain only a limited number of events before older data is pushed out. The crash event itself may be preserved, but the events leading up to it may not be if download is delayed. A qualified technician should image the ECM using manufacturer-approved software, and the download should be documented with photographs, serial numbers, and calibration information. Do not assume that a police report or insurance photograph is sufficient to preserve this data.
4. Lock Down the Driver Qualification File
Under 49 CFR Part 391, carriers must maintain a driver qualification file that includes the application, motor vehicle record inquiries, prior employment verification, medical certification, road test certificate, and annual review. These records must be retained for the duration of employment plus three years. In practice, files are sometimes incomplete, updated late, or reconstructed after a crash. The original file should be requested in its entirety, including any electronic workflow records that show when each document was added, modified, or signed. Pay particular attention to medical certification dates, disqualifying offenses, and any gaps in prior employment verification.
5. Obtain Dispatch, Load, and Communication Records
Dispatch records reveal the schedule the driver was expected to keep, the load assignment, delivery windows, and any pressure applied to complete the run. Text messages, Qualcomm messages, emails, and phone logs between the driver and dispatcher can show whether the carrier knew the driver was out of hours, delayed, or fatigued. These communications are often stored on third-party platforms with their own retention policies. Request them broadly at the outset, because once a user deletes a message thread or the platform purges old data, it may be unrecoverable.
6. Inspect Maintenance and Vehicle Inspection Records
Vehicle maintenance files under 49 CFR Part 396 must be retained for one year from the date of each entry for the power unit and six months for intermodal equipment. Pre-trip and post-trip inspection reports must be retained for three months. Brake adjustments, tire replacements, lighting repairs, and out-of-service repairs all belong in this file. If the crash involved a mechanical issue, the inspection and repair history may be the most important evidence in the case. Request the complete maintenance file for the power unit and trailer, not just the most recent entries.
7. Issue a Litigation Hold and Preservation Letter
A general records request is not enough. The preservation letter should identify each category of record by name, describe the systems where it is stored, and instruct the carrier to suspend any automatic deletion, overwriting, or purging processes. It should cover ELD data, dashcam video, ECM downloads, driver qualification files, dispatch records, maintenance files, and any other records relevant to the specific crash. The letter should be sent as soon as the carrier is identified, and it should be followed with a litigation hold once suit is filed. Document the date and method of service. If the carrier fails to preserve evidence after receiving notice, that failure itself becomes a factual issue in the case.
What to Do When Records Are Missing
Not every case has a complete record set. Some carriers destroy evidence intentionally. Others lose it through ordinary turnover, system migrations, or a failure to appreciate its relevance. When records are missing, the analysis shifts to what should have existed, what the surviving records show, and whether the gaps are consistent with the carrier's obligations under federal regulations. Bill can help identify what records should have been produced, evaluate whether the absence is explainable, and explain to a jury or judge why the missing evidence matters.
If you are handling a commercial vehicle case and need help preserving evidence or reviewing what has already been produced, contact Bill directly. Early involvement is the best way to avoid the most common discovery problem in trucking litigation: finding out too late that the data you needed was deleted months ago.
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