Expert Witness Blog

In the recent and highly consequential case of Thomson Reuters Enter. Ctr. GMBH v. Ross Intelligence Inc., D. Del. 2025, the court’s analysis and reliance on a Copyrights Expert Witness played a pivotal role in resolving complex questions at the intersection of artificial intelligence and copyright law. This case stands as a touchstone for the evolving legal landscape surrounding the use of copyrighted material in AI training and the admissibility and weight of expert testimony in such disputes.

Background and Parties

Thomson Reuters, the publisher of the Westlaw legal research platform, brought suit against Ross Intelligence, a developer of AI-powered legal research tools. The core allegation was that Ross had copied thousands of Westlaw’s proprietary headnotes—editorial summaries of case law decisions—to train and validate its AI system, thereby infringing Thomson Reuters’ copyrights. Ross asserted multiple defenses, including fair use, arguing that its use was transformative and did not harm the market for Westlaw’s products.

In the recent appellate decision of United States v. Borino, 5th Cir. 2023, the role of the White Collar Crime Expert Witness was pivotal in the court’s analysis of causation, loss calculation, and the application of the Mandatory Victims Restitution Act (MVRA) in a complex fraud prosecution.

Background and Parties

Joseph Anthony Borino was indicted in connection with a multi-million dollar wire fraud scheme orchestrated by his employer, Denis Joachim, and co-conspirator Donna Joachim. The fraudulent enterprise involved the misappropriation of client funds through a tax resolution business, resulting in substantial losses to numerous victims. Borino, initially charged with conspiracy to defraud the IRS, making false statements, and wire fraud, ultimately pleaded guilty to misprision of a felony—specifically, concealing the ongoing wire fraud.

In the pivotal case of Waak v. Rodriguez, Texas Supreme Court 2020, the role of the Livestock Expert Witness was central to the court’s analysis of liability under the Texas Farm Animal Activity Act (the “Act”) and the broader question of rancher responsibility for livestock-related injuries.

Background and Facts

The case arose after Raul Zuniga, a full-time ranch hand employed by Conway and Marlene Waak, was fatally injured while working cattle on the Waak ranch. Zuniga’s duties included herding, feeding, and general care of livestock. During a routine cattle-moving operation, Zuniga was trampled, resulting in his death. His family brought wrongful death and survival claims against the Waaks, alleging negligence in ranch operations and livestock handling.

The role of a 3D Laser Scanning Expert Witness has become increasingly pivotal in modern litigation, especially in cases involving accident reconstruction and crime scene analysis. In a recent case, the expert’s testimony was instrumental in establishing the sequence of events and influencing the jury’s understanding of the facts.

Background and Facts

The case arose from a tragic incident at a gas station in Marietta, Cobb County, Georgia. Early one Sunday morning, four teenagers initiated a violent altercation with a man. The confrontation escalated as the teenagers punched and kicked the victim, ultimately pushing him into traffic. The man was left unconscious in the roadway, where he was struck by a passing vehicle and later died from his injuries. The prosecution charged the teenagers with murder, and the case proceeded to trial, hinging on the precise reconstruction of the events leading to the victim’s death.

Background and Facts

Estate of Olsen v. Agtegra Cooperative, South Dakota Supreme Court 2023 arose from a dispute over alleged herbicide damage to ponderosa pine trees on the Olsen family’s property in Spink County, South Dakota. In October 2014, while guiding a hunting party, the Olsens’ son observed a crop duster spraying herbicide near their land. The Olsens subsequently claimed that the herbicide application caused significant damage and death to their trees. They filed suit against Agtegra Cooperative and related defendants, alleging various causes of action including trespass, statutory and common law nuisance, promissory estoppel, and civil conspiracy.

Parties

The United States Supreme Court’s decision in Ensign v. Pennsylvania, 227 U.S. 592 (1913) stands as a foundational case examining the admissibility and scope of testimony provided by a Bankruptcy Expert Witness in criminal proceedings arising from bankruptcy matters. This case provides critical guidance on the intersection of expert analysis, bankruptcy records, and constitutional protections against self-incrimination.

Background and Facts

The plaintiffs in error, Ensign and his business partner, operated as private bankers in North East, Pennsylvania. On February 12, 1908, they accepted a deposit of $1,000 from the prosecuting witness. Merely days later, they closed their banking house and made an assignment for the benefit of creditors, ultimately leading to involuntary bankruptcy proceedings. The Commonwealth of Pennsylvania indicted the bankers under a statute prohibiting insolvent bankers from accepting deposits, with the February 12 deposit forming the basis of the criminal charge.

In the recent federal case of Feindt v. United States of America, D. Haw. 2024, the role and reliability of a Birds Expert Witness were central to the court’s analysis of expert testimony admissibility under Daubert and Rule 702. This case provides a clear illustration of how federal courts rigorously evaluate the scientific foundation and relevance of expert opinions, particularly when those opinions bear directly on causation and damages in complex toxic exposure litigation.

Background and Parties

Plaintiffs in Feindt v. United States of America alleged injuries resulting from exposure to JP-5, a type of jet fuel, at a military installation. The United States, as defendant, challenged the admissibility of expert testimony offered by Dr. Steven Bird, M.D., who was designated by the plaintiffs to provide opinions on causation, long-term health effects, and future care needs related to JP-5 exposure.

In employment litigation, the testimony of a Compensation Expert Witness is often pivotal in quantifying damages and guiding the court’s assessment of lost earnings, benefits, and future compensation. A recent case exemplifying the decisive influence of such expert testimony is the federal appellate decision in Smith v. Arizona, 602 U.S. ___ (2024).

Background and Parties

The plaintiff, Jason Smith, was charged with multiple drug offenses after law enforcement discovered a substantial quantity of controlled substances and related paraphernalia in his possession. The prosecution’s case relied heavily on forensic analysis to establish the identity and quantity of the seized substances. The central evidentiary dispute arose not over the presence of drugs, but over the admissibility and reliability of expert testimony regarding the forensic analysis, which directly impacted the calculation of potential sentencing and, by extension, the assessment of economic consequences and compensation-related damages.

In a recent franchise litigation, the role of the Distribution Expert Witness proved pivotal in clarifying complex issues of market allocation, dealer agreements, and supply chain practices. The case involved a dispute between a franchisor and a terminated franchisee, centering on allegations of unfair distribution practices and breach of contract. The parties were a national automotive parts franchisor and a regional franchisee operating several outlets in the Northeast.

The franchisee alleged that the franchisor’s revised distribution model, which consolidated regional warehouses and altered delivery schedules, violated the terms of the dealer agreement and resulted in lost sales, diminished market share, and increased operational costs. The franchisor countered that the changes were industry-standard efficiency measures, justified by evolving logistics and competitive pressures.

To resolve the technical aspects of distribution and dealer obligations, both parties retained expert witnesses specializing in distribution systems and franchise operations. The plaintiff’s Distribution Expert Witness possessed extensive experience in automotive supply chains and franchise law. This expert conducted a forensic analysis of historical delivery data, inventory turnover rates, and comparative market performance before and after the distribution changes. The methodology included regression analysis to isolate the impact of altered delivery schedules on sales volume, as well as benchmarking against similar franchise systems.

The role of an Economics Expert Witness in complex litigation has become increasingly critical as courts grapple with sophisticated financial analyses and class-wide damage calculations. Recent federal cases demonstrate how economic expert testimony can make or break class certification motions, particularly when courts apply rigorous Daubert standards to evaluate the reliability and relevance of proposed methodologies.

The Growing Importance of Economic Expert Analysis

Federal courts have witnessed a substantial increase in cases requiring specialized economic analysis, particularly in class action litigation where demonstrating common impact and class-wide damages presents unique challenges. The Department of Justice has recognized this trend, increasing funding for expert witness services by 18.5% for Fiscal Year 2025, from $270 million to $320 million, acknowledging that complex litigation would not be possible without qualified experts to testify on specialized economic matters.