| name | expert-witness-report-analysis |
| language | en |
| description | Critiques opposing expert witness reports for admissibility challenges, disclosure deficiencies, and cross-examination vulnerabilities. Triggers when the user provides an expert report for analysis, needs Daubert/Frye assessment, requests a motion to exclude or limit expert testimony, or prepares deposition or trial cross-examination of an opposing expert. |
| tags | ["analysis","litigation","memo"] |
Expert Witness Report Analysis
Produces a litigation-ready memorandum assessing an opposing expert's report for admissibility, methodology flaws, and impeachment opportunities under Daubert or Frye.
Prerequisites
Collect before starting:
- Expert report — full text with all opinions and basis statements
- Expert CV — credentials, publications, prior testimony history
- Underlying data/exhibits — materials the expert relied upon
- Case file materials — pleadings, discovery, relevant fact record
- Jurisdiction — federal (Daubert) vs. state (Frye or hybrid)
- Deposition transcripts (if available) — for prior inconsistent statements
Workflow
Step 1: Extract and Catalog Opinions
Number each opinion verbatim with report page citations. For each, record the factual predicates claimed, methodological steps, and expressed certainty level.
Step 2: Assess Qualifications
Extract credentials against this checklist:
- Degrees, licenses, board certifications (verify currency)
- Publications and peer-reviewed work
- Prior testimony history — frequency, plaintiff vs. defendant ratio
- Litigation income percentage vs. professional practice
- Prior exclusions, judicial criticism, sanctions, retractions
Map each opinion to the expertise it requires. Flag gaps under FRE 702.
Step 3: Check FRCP 26(a)(2) Disclosure Completeness
Flag any missing or incomplete required elements:
- Complete statement of all opinions
- Basis and reasons for each opinion
- Facts or data considered
- Exhibits to be used
- Qualifications (CV)
- Cases with testimony in past 4 years
- Compensation statement
Missing elements are independent grounds for exclusion under FRCP 37(c)(1).
Step 4: Analyze Methodology
Trace each analytical chain: raw data → intermediate steps → final opinion.
Assess per step: claimed method, standard practice, departures, and justification.
Red flags:
- Litigation-only method not used in regular practice
- Cherry-picked data or ignored contradicting information
- Unsupported assumptions or no independent testing
- Failure to test alternative hypotheses
- Backward reasoning from conclusion to data
- Internal inconsistencies between report sections
Step 5: Evaluate Admissibility
Daubert (Daubert v. Merrell Dow, 509 U.S. 579 (1993); Kumho Tire v. Carmichael, 526 U.S. 137 (1999)) — assess each factor:
| Factor | Assessment |
|---|
| Testability | Satisfies / Fails / Partial |
| Peer review | Satisfies / Fails / Partial |
| Error rate | Satisfies / Fails / Partial |
| General acceptance | Satisfies / Fails / Partial |
| Fit to case facts | Satisfies / Fails / Partial |
Frye (Frye v. United States, 293 F. 1013 (D.C. Cir. 1923)) — identify the relevant scientific community, document general acceptance evidence, flag controversy or rejection.
Cite analogous case law where experts with similar deficiencies were excluded or admitted. State motion recommendation: exclude, limit, or reserve for cross.
Step 6: Draft Cross-Examination Outline
Structure each theme as: Lock in → Establish standards → Expose deviation → Force concession.
Common themes:
- Credentials gap — establish field, narrow to sub-discipline, obtain admission of no training/publications, confront with opinion scope
- Ignored contrary data — establish duty to consider all information, identify what existed, confirm non-review, force choice (ignorance vs. deliberate omission)
- Litigation-only methodology — obtain method description, confirm no publications or non-litigation use, introduce authoritative contrary standard
Include impeachment sequences for prior inconsistent publications, depositions, or testimony in other cases.
Step 7: Formulate Recommendations
- Rebuttal expert — required or optional; specify needed qualifications
- Additional discovery — depose expert, obtain working files/drafts/counsel communications, third-party discovery to verify assumptions
- If testimony admitted — cross themes, limiting instruction requests, closing argument framing on weight vs. credibility
Output Format
Structure the memorandum as:
- Executive summary (≤2 pages) — expert identity, numbered key opinions, admissibility recommendation, top 3-5 challenges with strategic impact
- Qualifications assessment with credentials-to-opinion gap table
- Disclosure deficiency analysis
- Methodology analysis with step-by-step assessment table
- Opinion-by-opinion analysis — factual predicates, method, logic gaps, certainty assessment, vulnerability summary
- Admissibility assessment with Daubert/Frye evaluation and analogous case law
- Cross-examination outline
- Recommendations
Pitfalls and Checks
- Cite every assertion to the report, CV, or case record with page/paragraph references
- Tag
[VERIFY] on any case citation or statutory reference requiring confirmation
- Distinguish challenges to entire testimony vs. specific opinions — tailor motion scope
- Note jurisdiction-specific layers (e.g., affidavit-of-merit statutes in medical malpractice) beyond Daubert/Frye
- Distinguish Daubert's flexible reliability inquiry from Frye's binary general-acceptance test
- Maintain objective tone — acknowledge sound work rather than manufacturing weak challenges
- Mark every page Attorney-Client Privileged / Work Product
