Expert Witness Disclosure

Expert witness disclosure in Texas civil litigation is governed principally by Rule 195 of the Texas Rules of Civil Procedure, which establishes the procedural framework for identifying and disclosing testifying experts. Rule 195 distinguishes among three categories, retained or specially employed testifying experts, non-retained testifying experts, and consulting experts whose work is generally privileged from discovery, with different disclosure obligations for each. Non-compliance with Rule 195 disclosure deadlines triggers exclusion sanctions under Rule 193.6, often dispositive of the case.

Rule 195 disclosure categories

Retained or specially employed testifying experts: experts retained for the litigation (or whose duties as employees of the party regularly involve giving expert testimony) must produce: (1) the expert's name, address, and CV; (2) all documents the expert has been given relating to the subject matter; (3) the expert's mental impressions, opinions, and the underlying factual basis; (4) the rate and amount of compensation. The expert is subject to deposition by the opposing party. Non-retained testifying experts: testifying experts not retained for the litigation (e.g., treating physicians, fact witnesses with expertise) face lesser disclosure requirements but must still be timely identified. Consulting experts: experts retained for trial preparation but not designated as testifying are generally privileged from discovery under work-product protection, only their identity and impressions reviewed by the testifying expert are typically discoverable.

Disclosure deadlines

Rule 195's default deadlines depend on the burden of proof: (1) party with burden, disclosure 90 days before trial; (2) responding party, disclosure 60 days before trial. Parties may agree to alternative schedules; trial courts may modify by scheduling order. The standard pattern in commercial cases is a docket-control order extending the windows substantially, disclosure 4-6 months before trial is typical for complex commercial cases. The deadline runs from the actual trial date; continuances can reset deadlines but only by court order.

The exclusion sanction

Rule 193.6 imposes an automatic exclusion sanction for failure to timely disclose: a party who fails to comply with Rule 195 may not introduce the undisclosed expert's testimony unless the court finds (a) good cause for the failure or (b) lack of prejudice. The Texas Supreme Court has applied Rule 193.6 strictly, exclusion is the rule, not the exception. Late disclosure typically requires showing not only that the late evidence is important, but also that the party diligent ly attempted to comply and that any prejudice can be mitigated.

Expert depositions

Once disclosed, retained testifying experts are subject to deposition. Texas practice typically allows the opposing party 30 days from disclosure to take the deposition, scheduled before the deadline for the responding party's own disclosures. Deposition discovery probes: (1) qualifications and CV; (2) materials reviewed; (3) opinions and the basis for each; (4) methodologies and reasoning; (5) work performed for prior clients; (6) compensation. The deposition is the principal vehicle for developing reliability challenges and for identifying weaknesses to exploit at trial.

Practical drafting, the expert report

Expert reports in Texas commercial litigation typically include: (1) introduction, engagement scope, qualifications, methodology; (2) facts and assumptions, what the expert was asked to assume or accept; (3) analysis, application of methodology to facts; (4) opinions, clear statements of conclusions with supporting reasoning; (5) damages or other quantitative analysis, calculations with all assumptions disclosed; (6) materials reviewed, comprehensive list; (7) compensation and prior testimony, fee structure, rate, prior cases. The report should be detailed enough to survive a Daubert challenge and support the expert's deposition and trial testimony without significant amendments.