How Do I Preserve Evidence After a Trucking Accident? - HHJ Trial Attorneys
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The Importance of Preserving Evidence in Trucking Accidents

trucking accident
Founding partner of HHJ Trial Attorneys Elliott Jung black and white portrait

Gerry Spence Trial Lawyers College

Adam copy

University of California, Berkeley

Updated: May 28, 2025

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trucking accident
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Truck accidents involve unique regulations and aggressive defense from companies and insurers, unlike standard car crashes. Key details can be lost without immediate action to preserve physical, electronic, and eyewitness evidence. This blog explores the importance of preserving evidence so you can take the steps needed to support your claim.

Why Evidence Is Critical in Truck Accident Claims

To ensure success in a truck accident claim, you must provide evidence clearly demonstrating the link between specific actions or inactions and the accident. Presenting proof of negligence is critical to holding the right person or company responsible. Key pieces of evidence help to reconstruct the events leading to the accident and show if safety regulations were violated.

After establishing liability, the next step is to prove the extent of your damages. Evidence is required to illustrate the financial, physical, and psychological repercussions of the accident. Without thorough documentation, insurance companies may dispute your claim and argue about the severity of your damages. You may be offered a low settlement, or your claim can be denied outright.

Why You Need to Preserve Evidence Immediately

The urgency of evidence preservation after a truck accident cannot be overstated. Critical evidence is often lost, altered, or intentionally destroyed within hours or days of a crash. Skid marks fade, debris is cleared, and electronic data can be deleted. Large companies often have response teams tasked with collecting and controlling evidence to support the company’s interests.

Immediate evidence collection ensures that witness memories are fresh and that physical and electronic evidence is captured before it disappears. Surveillance footage is typically deleted on a set schedule, and black box data may be automatically overwritten. Every day that passes increases the risk of losing vital information that can substantiate your claim.

Types of Evidence Used in Trucking Accident Claims

Several types of evidence may provide valuable information about an accident. Evidence can be used to pinpoint specific details, prove liability, and substantiate your claim about how the accident happened. Solid evidence is vital when liability is disputed or claim validity is questioned.

Video Footage

Dashcam, CCTV, and traffic camera footage can reveal driver behavior, road conditions, and the exact sequence of events leading up to the accident. Visual evidence is irrefutable and can clarify conflicting accounts and disputed liability.

Collision Debris

Physical debris like broken parts and fluid spills helps accident reconstruction experts determine how the collision happened. Debris is often cleared quickly after an accident, so taking photos and videos immediately is essential.

Driver Logs

Federal regulations require truck drivers to maintain detailed logs of their trips and hours spent on the road. These logs can reveal violations of hours-of-service rules, potential fatigue, or data falsification, which can prove that the trucking company or driver was negligent.

Maintenance Records

Trucking companies are responsible for regular vehicle inspections and maintenance. If records show missed inspections or delayed repairs, it can demonstrate a pattern of negligence. Repairs may be postponed by trucking companies as a cost-cutting measure.

Electronic Control Module (ECM) Data

The truck’s ECM data, also known as “black box” data, records speed, braking, location, and hours of operation. This objective information is critical for reconstructing the accident and identifying safety standard violations.

Drug and Alcohol Test Results

Federal law requires drug and alcohol testing for commercial vehicle accidents. Positive results will indicate that the driver was impaired when the accident occurred. Driving under the influence is classified as negligence and will strengthen your claim.

Alcohol testing must be conducted within two hours of the accident. However, it can be performed up to eight hours later if necessary, with documentation explaining the delay. Drug testing must be completed within 32 hours of the accident.

The Role of an Attorney in Evidence Preservation

Hiring an attorney is not a legal requirement. However, consulting with a legal professional can significantly benefit your case. Personal injury claims are often handled on a contingency fee, so you only pay legal fees if your case succeeds. Attorneys play a critical role in truck accident cases; some of their responsibilities include:

  • Issuing spoliation letters: Attorneys send spoliation letters (also called preservation letters) to potential parties who hold evidence. This correspondence formally demands that all relevant evidence be preserved. Failure to comply with spoliation letters can result in fines.
  • Securing electronic data: Legal professionals know how to obtain electronic logs, black box data, and surveillance footage before it’s deleted. Securing this data often requires immediate legal action and technical expertise.
  • Obtaining court orders: If a trucking company refuses to release evidence, attorneys can file court orders that compel the immediate release of data. If the company doesn’t comply, it may be in contempt of court, resulting in fines or criminal charges.
  • Investigating the incident: Attorneys conduct independent investigations, which include visiting the accident scene, inspecting the vehicles, interviewing witnesses, and working with accident reconstruction experts to build a strong case.
  • Securing expert witnesses: Attorneys have the resources to hire experts like medical professionals, mechanics, industry insiders, mental health experts, etc., to provide professional analyses that support your claim.

Act Quickly to Preserve Critical Evidence

Preserving evidence after a trucking accident is pivotal to the success of your case. The evidence collected in the hours and days following your accident will form the foundation of your claim. Clear and compelling evidence is necessary to prove negligence, quantify your damages, and secure the compensation you deserve.

Trucking companies and their insurers act quickly to protect their interests, so you must act promptly to defend yours. If you’ve been involved in a truck accident, contact HHJ Trial Attorneys to schedule a consultation with a truck accident lawyer so we can send spoliation letters quickly and start the process. We will leave no stone unturned to help you protect your financial security.

professional attorney and founding partner of HHJ Elliott Jung
Elliot H. Jung

Gerry Spence Trial Lawyers College

Elliot H. Jung is a trial attorney at HHJ Trial Attorneys who focuses on helping injured clients navigate complex personal injury cases. With an emphasis on advocacy, case strategy, and client support, he works to secure fair outcomes for people facing medical bills, lost wages, and other accident-related losses. His approach combines legal experience with a commitment to clear communication and effective representation.

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