Key Takeaway
This AI expert evidence Tracker collects cases, claims and guidance in which artificial intelligence may have been used in preparing, checking or presenting expert evidence, or where AI output was itself put forward as evidence. This AI expert evidence tracker is a signposting tool. It brings together links and short notes so that readers can find the underlying material more easily. Entries may concern established findings, allegations, suspicions, reported incidents, disputed facts or issues that were never finally decided. Inclusion does not mean that the author accepts any allegation, agrees that AI was used, considers anyone responsible, or suggests that any conduct was unlawful.
The short notes are not a substitute for the full judgment, pleading, report or guidance. Readers should follow the links, check for later developments and make up their own minds. This AI Expert Evidence Tracker records cases and court guidance concerning the use of artificial intelligence to prepare, test or present expert evidence. It covers AI-assisted expert reports, AI-generated analyses, disclosure of prompts and outputs, challenges to reliability and admissibility, and cases in which litigants attempted to rely on an AI system in place of a qualified human expert.
Tracker Status: Active/Monitoring
Publication Date: 29 August 2026
Last Verified: 30 August 2026
Latest Case Chronologically:
Latest Legal Article:
Other AI Legal Trackers: AI Law Trackers Hub
Author and Contact: Matthew Lee (Barrister) click here for details.
Ad/Marketing Communication regarding AI Expert Evidence Case Law & Court Guidance Tracker
This legal article/report forms part of my ongoing legal commentary on the use of artificial intelligence in law. Not legal advice. Not Direct/Public Access. All instructions via clerks at Doughty Street Chambers. This legal article concerns AI expert evidence.
The AI Expert Evidence Case Law Tracker
| Date | Case/Matter | Type | Country | Discipline | Use Stage | Summary |
|---|---|---|---|---|---|---|
| 12-Aug-2026 | In re Bard Implanted Port Catheter Products Liability Litigation | Case | United States | Expert Report | The court found that the AI-written report lacked sufficient facts or data, contained multiple errors and had no reliable standards controlling the AI methodology. |
How to Use the AI Expert Evidence Tracker
The spreadsheet is a starting point. The most useful parts are usually the link, the date, the court or body involved and the status of the matter.
Some entries record a clear admission or finding about AI use. Others record an allegation, concern or suspicion which remained disputed. A report may have been excluded, criticised, admitted with reservations or left largely unaffected. Those are very different outcomes, so readers should not rely on the short summary alone.
What May Be Included
- an expert saying that AI helped with research, drafting, calculations or checking;
- a party alleging or suspecting that an expert used AI;
- false or unreliable material appearing in an expert report;
- questions about disclosure of prompts, outputs or working methods;
- arguments about reliability, admissibility, weight or independence;
- AI output being offered instead of evidence from a suitably qualified person; and
- court rules, professional guidance and consultations about expert use of AI.
A matter may be included even where no court finally decided that AI had been used. The entry should indicate that the point was alleged, suspected, reported, admitted or established.
What Is Usually Left Out of the AI Expert Evidence Tracker
The tracker does not try to include every case in which an expert gives evidence about an AI system. Its focus is the use, possible use or alleged use of AI in the expert-evidence process itself.
Sources and limitations of the AI Expert Evidence Tracker
Where possible, an entry links to a judgment, order, filed document or official publication. Sometimes the best publicly available source is a report, a party’s account or another secondary source. That difference matters and should be apparent from the entry.
The tracker is not intended to be a complete record of every relevant matter. Links can break, cases develop and descriptions may later need to change. Anyone using an entry for legal, academic or professional work should read the full source, check the current procedural position and look for any appeal, correction, settlement or later decision.
The tracker does not independently determine disputed facts or verify every technical claim made in the linked material.
How to Cite This AI Expert Evidence Tracker
Suggested citation: Matthew Lee, “AI Expert Evidence Case Law & Court Guidance Tracker”, Natural & Artificial Law, first published [insert publication date], last verified [insert date above].
Frequently Asked Questions
What does “AI expert evidence” mean here?
In broad terms, it means expert material which may have been prepared, checked or influenced by an AI tool, or AI output which a party has tried to use as expert evidence. The exact role of the tool may be clear in some cases and uncertain in others.
Does an entry mean that the expert definitely used AI?
No. Some entries involve an admission or a finding. Others involve an allegation, suspicion or concern recorded in a judgment, pleading or report. The linked source is the best place to see what was actually said and whether the point was resolved.
Is it improper for an expert to use AI?
Not necessarily. It is likely to depend on what the tool was used for, whether the expert understood and checked the result, whether the use was disclosed when required, and the rules applying in that court or profession.
Will an AI error make an expert report inadmissible?
It may affect admissibility, weight or credibility, but the result is likely to depend on the seriousness of the error, its connection to the expert’s opinion and whether the underlying work can still be explained and tested.
Must an expert disclose prompts or AI use?
Sometimes that may be required by a court order, procedural rule or professional duty. In other cases it may not be relevant. The position is developing and can differ between jurisdictions.
Can AI itself be an expert witness?
At present, courts usually expect a human expert to take responsibility for the opinion and to answer questions about it. AI output may still be placed before a court, but how it is treated will depend on the legal rules and the way it is presented.
Why include cases where AI use was only suspected?
Because the allegation or suspicion may itself affect disclosure, cross-examination, case management or professional responsibility. Inclusion records that the issue arose; it does not decide whether the suspicion was justified.
Can I rely on the spreadsheet summary?
It is better treated as a pointer to the source. Read the full linked material, check any later procedural history and form your own view before relying on it.
