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Expert Witness Blog

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Tax Expert Witness Testimony Under Scrutiny: Oklahoma Supreme Court Clarifies Discovery Limits for Expert Witness Financial Records

In the recent decision of JOLLEY v. McCLAIN, Oklahoma Supreme Court 2025, the Oklahoma Supreme Court addressed the scope of permissible discovery into the financial records of a Tax Expert Witness in condemnation proceedings. The case provides critical guidance on the intersection of expert witness bias, discovery rights, and the…

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Art Recovery Investigation Validates Family’s Ownership Claims: Antiques, Art, & Collectibles Appraisal Expert Witness Testimony Proves Decisive in Christie’s Auction House Dispute

The complex world of art authentication and ownership disputes came into sharp focus in Kozar v. Christie’s, Inc., New York Other Courts 2011, where an Antiques, Art, & Collectibles Appraisal Expert Witness played a crucial role in establishing the rightful ownership of a valuable painting that had been consigned to…

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Import/Export Expert Witness Testimony Shapes Outcome in Libas, Ltd. v. United States—A Critical Analysis of Expert Witness Reliability

In the pivotal case of Libas, Ltd. v. United States, 193 F.3d 1361 (Fed. Cir. 1999), the role of the Import/Export Expert Witness was central to the dispute over the classification of imported fabric and the reliability of expert testimony in customs litigation. Background and Facts Libas, Ltd., an importer…

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Case Summary Involving a Chemicals Expert Witness

  Introduction In the recent case of Monsanto Company v. Hardeman, No. 19-16636 (9th Cir. 2023), the testimony of a Chemicals Expert Witness played a pivotal role. This case revolved around claims that Monsanto’s herbicide, Roundup, caused non-Hodgkin lymphoma in the plaintiff, Edwin Hardeman. Background of the Case Edwin Hardeman…

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Case Summary Involving a Black Box/Data Recorder Expert Witness

  Introduction In the recent case of Johnson v. FedEx Freight, Inc., No. 21-1456 (E.D. Mo. 2023), the testimony of a Black Box/Data Recorder Expert Witness was pivotal. This case involved a severe vehicular accident where the plaintiff, Johnson, claimed that the truck driver employed by FedEx Freight was negligent…

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