Expert Witness Testimony

What is expert witness testimony?

Expert witness testimony is the sworn presentation of an expert's opinions and their basis, given at a deposition or at trial and tested by cross-examination. For a KWVRS expert the testimony rests on a report already prepared and disclosed in the case: a vocational evaluation, a forensic economic analysis, a life care plan or a physician's standard of care review. The witness explains the records read, the method applied, the data relied on and the conclusions reached, and answers for each of them under oath. Testimony is the last phase of an engagement rather than a product of its own; what the court hears is the report, defended by the person who wrote it.

The service line exists because giving testimony is a skill distinct from writing a report. A sound analysis can be lost at deposition by an expert who cannot state the basis for a figure without the document in hand, and a jury credits an opinion it can follow. KWVRS experts are examined on vocational, economic, life care and medical opinions in state and federal courts and before the administrative forums that hear workers' compensation claims, and the preparation described on this page is built around the questions each discipline draws.

When testimony is needed

Not every engagement reaches testimony. A report that both sides accept, or a case that settles once the reports are exchanged, ends without an appearance, and nothing is billed for a phase that never happens. Testimony is needed when the opposing party notices the expert's deposition, when the case is on a trial track and the report will be presented to the factfinder, when an opposing expert has served a contrary opinion that the court will hear both sides on, or when a motion challenging the reliability of the expert's method calls for the expert to explain it on the record. Counsel decides when to designate the expert and whether the deposition goes forward; the expert's office needs the date as soon as it is set so that preparation can be placed ahead of it.

Deposition testimony

A deposition is opposing counsel's examination of the expert under oath before trial, usually in a law office or by video, with a court reporter and sometimes a videographer. The questions run through qualifications, the engagement itself, every record reviewed and every record not reviewed, the method step by step, the data sources and their vintages, and the assumptions, with what would change in the conclusion if an assumption changed. The transcript is the deposition's product: it can be read to the jury, used to impeach trial testimony that departs from it, and quoted in motions. A KWVRS expert prepares for a deposition as for trial, with the file re-read, every figure in the report traced to its source and the likely lines of attack worked through with retaining counsel.

Trial testimony

At trial the audience changes. The judge or jury has not read the report, so direct examination walks through the expert's background, the assignment, what was reviewed, the method and the conclusions in an order a listener can follow, with exhibits and demonstratives where a table or a timeline says more than a sentence. Cross-examination then tests the same ground the deposition covered, with the transcript in opposing counsel's hand. Trial adds work a deposition does not: a read of the deposition transcript against the opinions to be given, the exhibits themselves, coordination with counsel on the order of direct examination, and standby time when the court's schedule moves. The expert who wrote the report is the one who takes the stand.

Remote testimony

Depositions are routinely taken by video conference, and courts allow remote trial testimony by order or by agreement in circumstances that vary by forum; counsel confirms what the court permits. Remote testimony changes the logistics, not the substance. The expert has the report, the file and the exhibits at hand in front of the camera, exhibits are shared on screen or pre-marked and circulated, and the oath, the objections and the transcript work as they do in a room. What it removes is travel and standby time, which is why counsel should say at the notice whether an appearance is in person or remote. Where a court requires the witness in the courtroom, the expert appears in the courtroom.

Rebuttal of an opposing expert

Rebuttal of an opposing expert takes two forms. Before trial it is a written critique of the served report, scoped when that report arrives: whether the opposing expert read the same records, applied the restrictions the providers documented, used current data for the right area and followed a method that can be reproduced. At trial it is testimony that answers the opposing opinion point by point, in the same discipline, so that the factfinder hears why two experts reached different figures from one file. A KWVRS expert gives rebuttal testimony only on matters within the discipline of the underlying report: a vocational expert does not rebut an economist, and a life care planner does not rebut a physician on the standard of care.

Disclosure statements and reports

Testimony can be given only on opinions that were disclosed on time and in the form the forum requires. Some forums call for a signed written report that states the opinions, their basis, the data considered, the exhibits, the expert's qualifications, prior testimony and compensation; others accept a statement of the substance of the opinions supplied through counsel. The report the testimony rests on is written to serve as that disclosure where the forum requires one, and the expert disclosure service prepares the disclosure deliverable to the forum's framework, state by state. An opinion first voiced at deposition or trial that was never disclosed is the commonest ground for excluding it, so a supplemental opinion that follows new records is disclosed before it is given under oath. Attorneys confirm the governing rule for their case.

Preparation with counsel

Preparation is the phase that decides how testimony goes. The expert re-reads the report and the whole file, including the records that were considered and set aside, and traces every figure in the report to a page or a published table so that no number has to be defended from memory. Retaining counsel and the expert then meet to identify the opinions that matter most, the questions cross-examination is likely to press, the weaknesses in the file that opposing counsel will find, and the demonstratives that will carry the direct examination. For trial, the deposition transcript is read against the opinions to be given so that the testimony is consistent with what was said under oath before. Preparation is the expert's own work in the expert's own words; counsel frames the questions, never the answers.

How an expert testimony engagement proceeds

An expert testimony engagement follows the five steps below, from the file review that identifies the report the testimony rests on through trial testimony, with the deposition and the trial phases placed by the notice and the court's calendar rather than by the expert. The testimony process page sets out each step in full and what counsel supplies at each.

Typical timeline

There is no report turnaround on this page, because the report already exists when testimony is retained. The phases below are placed by the case calendar: the notice fixes the deposition, the court fixes trial, and the file review and the preparation session are set back from each date. The testimony timeline page states how much lead time each phase needs and what compresses it.

What an expert testimony engagement costs

Testimony is charged in two parts, hourly preparation and the deposition or trial rate for time on the record, with standby and travel where trial requires them, all against a retainer under a written fee schedule that comes before the engagement is confirmed. What moves the total is the number of appearances, whether each is in person or remote, and how much rebuttal and exhibit work trial calls for. The testimony cost page sets out the drivers and the billing terms.

Deliverables

The deliverable is the testimony itself: a deposition transcript that states the opinions and their basis in a form that survives being read back at trial, and trial testimony through direct and cross-examination. Around it sit the exhibits and demonstratives prepared for trial, a written rebuttal critique of an opposing expert's report where counsel scopes one, and supplemental opinions that update the report when new records or a rebuttal report arrive between the report and the stand. Each is scoped and billed as its own item. The underlying report is not a testimony deliverable; it is described, with its own timeline and cost, on the pages for vocational evaluation, forensic economics, life care planning and standard of care review.

Who retains testimony, and who gives it

Testimony is retained by the counsel who retained the report, plaintiff or defense, and in a case where KWVRS wrote no report the engagement begins with the evaluation that produces one. The witness is always the expert responsible for the report: the vocational expert who signed the evaluation, the economist who built the present-value analysis, the life care planner who priced the plan or the physician who reviewed the standard of care. That is the rule whichever side retains the firm, and it is why a report is never handed to a colleague to defend. The roster below lists the KWVRS experts whose stated specialties include expert testimony, and the retention section that follows explains what the engagement requires of counsel.