AI Systems, Model Behavior and Expert Testimony
AI Expert Witnesses for Model and Output Disputes
An AI system made a decision, wrote a document, generated a recording or allegedly copied someone's work, and a court now has to understand how. The examination starts with the model version, the prompts, the retrieval records, the training data manifests and the logs, because together they establish what the system had in front of it, what it produced and why. GDF experts have explained disputed technology in federal and state courts, and they walk a judge and jury through the mechanism one exhibit at a time.
Preserve the AI Record Before Anyone Replays It
Preserve the original requests, the outputs, the prompts where they exist, the model and provider identifiers, the tool and retrieval context, the parameters and the timestamps before anyone experiments. A later replay of the same prompt may produce a different answer because the service, the model or the sampling changed, and repeatable analysis of retained records is a different thing from exact reproduction of a live response. An expert who does not draw that line will be made to draw it on cross examination.
A controlled test shows the application path and the conditions that produced a result. Training data and causation questions turn on the internal records, so we ask for data manifests, model cards, version histories and deployment logs early and build the opinion on what those records show.
We match the opinion requested with the model, statistical, software or domain specialist it needs, and the engagement names the assigned examiner, the qualifications, the access available and the records in hand, so the retaining firm knows from the first conversation who will address each technical question.
Primary references: NIST AI 100-2 E2025, Adversarial Machine Learning: A Taxonomy and Terminology of Attacks and Mitigations.
Facing an AI claim you need to test before the expert disclosure deadline? Describe the system and the schedule and we will say what the record can establish before you commit to an opinion.
A Technology Expert Practice Tested in Court
Global Digital Forensics has operated since 1992. Our expert practice has testified in federal district court, works in multidistrict litigation, arbitration and ITC 337 proceedings and most often serves Fortune 1000 companies and AmLaw 100 firms. Joseph Caruso, our founder, CEO and CTO, has worked in technology since 1980 across software development, mainframe databases, real time transaction systems, mobile devices and cellular networks. His consulting expert work in Motorola Mobility v. Microsoft and Apple v. Samsung, his analysis of reservation architecture, source code and system configuration in an American Express consumer class action and his examination of transaction and deposit systems in Bank One shareholder litigation are the same work an AI dispute demands: open the system, follow the data and explain the mechanism.
In COMLAB v. Kal Tire, a federal court accepted him as an expert in computer forensics and computer science and described his testimony as reasonable, logical, and ultimately highly credible. That is the standard every opinion on an AI system leaves this practice to meet.
The first call is the place to request his CV, and Joseph Caruso's credentials are listed on the About page.
Turn the AI Record Into Testimony a Jury Can Follow
AI disputes combine software, data, user instructions and decisions made by the organization that deployed the system, and the argument usually hides in the seams between them. Counsel needs an expert who can separate those components, test the technical questions that actually matter to the claim and explain the findings in sequence to an audience that has never seen a model weight or a retrieval log.
GDF brings its technology expert witness experience to models, application behavior, data provenance, evaluation claims and material generated or modified by AI. We work with the litigation team on the assignment, the records to request, the testing protocol and the reporting schedule, so the examination serves the issues and the deadlines in the case rather than becoming a science project. Call (800) 868-8189 to talk through the technical claim.
AI Systems, Data and Behavior We Examine
We identify the model, the software version and the configuration associated with the disputed output, because an opinion about a system that has since been updated is only as good as the record of what was running at the time.
We examine the data supplied, retrieved or otherwise used in the workflow to establish what information the system had available when it acted.
We review how performance, accuracy or bias claims were evaluated, bringing in the qualified statistical or domain specialist the opinion requires rather than stretching one expert across every question.
We connect the user request with the recorded system action to reconstruct the application sequence, which is often where responsibility among the vendor, the deployer and the user is decided.
We assess how the available source code, model artifacts and training records relate to the disputed technology claim, drawing on the source code and systems work that has been part of this practice since its founding.
We identify the technical evidence that supports or undermines an opposing expert's conclusion so counsel can prepare focused questions for deposition and trial.
We identify the question first, then the evidence and the methods needed to answer it, so the engagement spends its budget on what the case turns on.
Bring the disputed output, the model or vendor involved and the deadline, and a technology expert will scope the examination with you on the first call.
Talk Through the AI Claim Before the Expert Deadline Arrives
Tell us the technical claim, the systems involved and your reporting deadline. A senior examiner will discuss the records to request, the testing the opinion needs and the expert explanation the court will require, and the first consultation is free.
Expert Reports, Affidavits and Rebuttal of the Opposing AI Expert
Our reports describe the system, the questions examined, the methods, the findings and the supporting material, with diagrams, timelines and worked examples that show how data and instructions move through the application. A report built this way holds up in the motion practice that follows it, because every conclusion points to a record.
When the other side has an AI expert, we examine the report, the underlying records, the testing, the assumptions and the conclusions, and the retaining firm receives focused technical analysis for rebuttal, deposition preparation and questioning, with affidavits, declarations and supporting exhibits where the assignment requires them.
If the opposing expert's report has already landed, call (800) 868-8189 and we will tell you what we would need to test it and how quickly a rebuttal can be prepared.
Testimony That Makes the Technology Plain From the Stand
A judge or jury should be able to follow how an AI result was produced and why the technical findings matter to the dispute. We explain the relevant components in the order they act and tie the testimony to the records and the exhibits, which is how a technical opinion earns weight rather than merely being heard.
As an illustration, a single diagram can show a user's question, the documents an application retrieved, the model's response and the action a connected tool recorded. That sequence tells the court which part of the system is under examination and keeps the testimony anchored to something it can see.
For software, database and systems disputes, read about our expert witness and neutral examination practice, then ask which examiner should carry your matter.
Match the Evidence and the Method to the Claim
The examination may include model versions and checkpoints, data manifests, source code, configuration, prompts, outputs, retrieval records, evaluation results and deployment logs. We record the conditions and methods used in every test and connect each material finding to a specific record, so the opinion can be checked rather than merely trusted.
The forensic reconstruction of how a system was built, trained, prompted and used sits with our AI Forensics practice. Training data and software disputes can draw on trade secret forensic analysis. Questioned recordings and images connect to AI and deepfake analysis. A security assessment of a deployed system belongs with AI security consulting.
Plan the Engagement From the First Call
Bring the disputed technical issue, the relevant reports, the systems you know about, the evidence available and the deadlines. We help identify the expert role, the evidence requests, the examination sequence and the deliverables, and we address relevant experience, potential conflicts and disclosure requirements before engagement.
The result is a coordinated technical record that supports clear reporting, deposition and trial testimony. The legal team can review the methods, the supporting exhibits and the explanation at every stage, so nothing in the final report arrives as a surprise.
Still weighing whether to retain an expert at all? The digital forensics FAQ answers the questions attorneys raise before engaging an examiner.
Bring the devices, accounts and dates involved to a free first call. Start the conversation here.
Logs, Prompts, Training Data and Model Versions We Examine
Model, application and data records establish the system and the information involved in the disputed event. Prompts, outputs, evaluations and logs connect the request, the recorded result and the available performance evidence, and opposing expert reports with their supporting material let us examine the basis for every technical claim made against your client.
Expert Reports and Litigation Support You Receive
Expert reports, affidavits and exhibits explain the findings and the evidence behind each opinion. Technical review and rebuttal analysis help the trial team evaluate competing explanations and prepare questions, and deposition and trial testimony explain the technical record and the methods within the expert's assignment.
Ask who would sign the report and take the stand, and the first call names the examiner, whose credentials are on the About page.
Tell us what happened and when, and a senior examiner will say which sources to secure first.
Meet the Forensic Team and Plan the Expert Engagement
Tell us the tribunal, the deadline and the AI system involved and we will propose the expert role, the examination plan and the report format on the first call, with the examiner and the office that fit your matter.
Frequently asked
Ask an examiner how this applies to your matter; the first consultation is free.
AI Expert Testimony: Rebuttal, Training Data and Affidavits
Can you explain AI concepts to judges and juries?
Yes. We build reports, diagrams and testimony that explain the relevant AI components in the order they act and connect each finding to the evidence in the case, so the court follows the mechanism rather than taking the conclusion on faith.
Can you review an opposing AI expert?
Yes. We examine the report, the underlying material, the testing and the reasoning, and we deliver technical findings that support rebuttal, deposition preparation and focused questioning.
Can the examination include training data and model behavior?
Yes, within what the records and the access allow. We scope the relevant model artifacts, data records, evaluations and application activity, document the methods and the supporting evidence, and identify any missing versions or provider records that should be requested in discovery.
Can you prepare affidavits and testify?
Yes. Our expert engagements can include reports, affidavits, declarations, deposition, hearing and trial testimony, coordinated with the retaining attorneys and the assignment, and our experts have testified in federal district court.
What should we provide first?
Start with the technical issue, the parties, the deadlines and an overview of the available evidence. We will discuss the relevant expertise, the examination plan and the report or testimony needed, and the first consultation is free.
Put a Court Qualified Technology Expert on the AI Question
The first call covers the AI claim, the records you hold and the schedule, and it ends with a recommended expert role and a list of the evidence to request. Once the scope is set we arrange a secure transfer for the materials.
GDF does not accept pro se litigation cases, and GDF may decline matrimonial or family law cases at our discretion.
Reviewed by Joseph Caruso, Founder, CEO and CTO, CISSP. Last reviewed .