Expert Witness Rebuttal Report

EXPERT WITNESS REBUTTAL REPORT

Case Information

Case Caption: [________________________________]

Case Number: [________________________________]

Court: [________________________________]

Jurisdiction: [________________________________]

Retaining Party: ☐ Plaintiff ☐ Defendant ☐ Other: [________________]

Retaining Counsel:

• Name: [________________________________]
• Firm: [________________________________]
• Address: [________________________________]
• Phone: [________________________________]
• Email: [________________________________]

Expert Identification

Expert Name: [________________________________]

Professional Title: [________________________________]

Business Address: [________________________________]

Phone: [________________________________]

Email: [________________________________]

Field of Expertise: [________________________________]

Report Being Rebutted

Opposing Expert Name: [________________________________]

Opposing Expert Credentials: [________________________________]

Date of Opposing Expert Report: [__/__/____]

Title of Opposing Expert Report: [________________________________]

I. Purpose and Scope of Rebuttal

This rebuttal report is prepared pursuant to Federal Rule of Civil Procedure 26(a)(2)(D)(ii) and is intended solely to contradict or rebut evidence on the same subject matter identified in the report of [Opposing Expert Name], dated [__/__/____].

A. Specific Opinions Being Rebutted

☐ Opinion 1: [________________________________]
☐ Opinion 2: [________________________________]
☐ Opinion 3: [________________________________]
☐ Opinion 4: [________________________________]
☐ Opinion 5: [________________________________]

B. Scope Limitations

This rebuttal report addresses only the opinions and conclusions set forth in the opposing expert's report. It does not introduce new opinions or subject matters beyond those necessary to respond to the opposing expert's contentions.

II. Summary of Disagreements

III. Detailed Rebuttal Analysis

A. Rebuttal to Opinion 1

Opposing Expert's Opinion:
[________________________________]
[________________________________]
[________________________________]

Scientific/Technical Disagreement:
[________________________________]
[________________________________]
[________________________________]

Errors in Methodology:
☐ Inadequate data collection
☐ Flawed analytical approach
☐ Inappropriate methodology for subject matter
☐ Failure to consider relevant variables
☐ Computational or mathematical errors
☐ Other: [________________________________]

Specific Errors Identified:
[________________________________]
[________________________________]
[________________________________]

Correct Analysis:
[________________________________]
[________________________________]
[________________________________]

Supporting Authority/Literature:
[________________________________]
[________________________________]

B. Rebuttal to Opinion 2

Opposing Expert's Opinion:
[________________________________]
[________________________________]
[________________________________]

Scientific/Technical Disagreement:
[________________________________]
[________________________________]
[________________________________]

Errors in Methodology:
☐ Inadequate data collection
☐ Flawed analytical approach
☐ Inappropriate methodology for subject matter
☐ Failure to consider relevant variables
☐ Computational or mathematical errors
☐ Other: [________________________________]

Specific Errors Identified:
[________________________________]
[________________________________]
[________________________________]

Correct Analysis:
[________________________________]
[________________________________]
[________________________________]

Supporting Authority/Literature:
[________________________________]
[________________________________]

C. Rebuttal to Opinion 3

Opposing Expert's Opinion:
[________________________________]
[________________________________]
[________________________________]

Scientific/Technical Disagreement:
[________________________________]
[________________________________]
[________________________________]

Errors in Methodology:
☐ Inadequate data collection
☐ Flawed analytical approach
☐ Inappropriate methodology for subject matter
☐ Failure to consider relevant variables
☐ Computational or mathematical errors
☐ Other: [________________________________]

Specific Errors Identified:
[________________________________]
[________________________________]
[________________________________]

Correct Analysis:
[________________________________]
[________________________________]
[________________________________]

Supporting Authority/Literature:
[________________________________]
[________________________________]

D. Rebuttal to Additional Opinions (As Needed)

[________________________________]
[________________________________]
[________________________________]
[________________________________]

IV. Facts and Data Considered

A. Materials Reviewed for This Rebuttal

☐ Opposing expert's report dated [__/__/____]
☐ Opposing expert's deposition transcript dated [__/__/____]
☐ Opposing expert's file materials
☐ Original case materials previously reviewed
☐ Additional materials: [________________________________]

B. New Materials Reviewed (If Any)

C. Testing or Analysis Performed for Rebuttal

☐ No additional testing performed
☐ Additional testing performed as follows:

[________________________________]
[________________________________]
[________________________________]

V. Methodology Used in Rebuttal

A. Analytical Framework

[________________________________]
[________________________________]
[________________________________]

B. Reliability of Methodology

The methodology employed in this rebuttal:
☐ Is generally accepted in the relevant scientific/technical community
☐ Has been tested and subjected to peer review
☐ Has a known or potential error rate
☐ Is based on sufficient facts or data
☐ Is the product of reliable principles and methods

C. Application to Facts

[________________________________]
[________________________________]
[________________________________]

VI. Rebuttal Conclusions

Based on my review and analysis, I have reached the following conclusions that contradict or rebut the opposing expert's opinions:

Conclusion 1:

[________________________________]
[________________________________]
[________________________________]

Conclusion 2:

[________________________________]
[________________________________]
[________________________________]

Conclusion 3:

[________________________________]
[________________________________]
[________________________________]

Conclusion 4:

[________________________________]
[________________________________]
[________________________________]

VII. Exhibits and Attachments

VIII. Qualifications

My qualifications to render the opinions in this rebuttal report are set forth in my curriculum vitae, attached hereto as Exhibit [____], and include:

[________________________________]
[________________________________]
[________________________________]

IX. Compensation

I am being compensated at the rate of $[________] per hour for my work on this matter. My compensation is not contingent upon the outcome of this litigation or the opinions expressed herein.

X. Certification

I hereby certify that:

☐ This rebuttal report is limited solely to contradicting or rebutting evidence on the same subject matter as the opposing expert's report
☐ The opinions expressed herein are based on my education, training, and experience
☐ The methodology employed is reliable and generally accepted in my field
☐ I have reliably applied the principles and methods to the facts of this case
☐ The opinions expressed are held to a reasonable degree of professional certainty

XI. Signature and Attestation

I declare under penalty of perjury that the foregoing is true and correct to the best of my knowledge, information, and belief.

Expert Signature: ___________________________________

Printed Name: [________________________________]

Date: [__/__/____]

XII. Reservation of Rights

I reserve the right to supplement this rebuttal report should additional information become available, including but not limited to:

• Additional depositions of the opposing expert
• Additional documents produced in discovery
• Supplemental reports by the opposing expert
• Additional time for testing or analysis

Sources and References

• Federal Rules of Civil Procedure, Rule 26 - https://www.law.cornell.edu/rules/frcp/rule_26
• Federal Rules of Evidence, Rule 702 - https://www.law.cornell.edu/rules/fre/rule_702
• Federal Rules of Evidence, Rule 703 - https://www.law.cornell.edu/rules/fre/rule_703

NOTICE: Under FRCP 26(a)(2)(D)(ii), rebuttal expert disclosures must be made within 30 days after the opposing party's disclosure unless otherwise ordered by the court. Verify applicable deadlines with local court rules and scheduling orders.