In an en banc decision in EcoFactor, Inc. v. Google LLC, the US Court of Appeals for the Federal Circuit concluded that the district court abused its discretion by admitting testimony from a damages expert that a lump-sum...more
Last week, in EcoFactor, Inc. v. Google LLC, the Federal Circuit issued its first en banc decision in a utility patent case in several years. The case involves the gatekeeping function of district courts vis-à-vis expert...more
In a toxic tort case, plaintiffs must establish general causation. If a substance is incapable of causing the type of injury plaintiff claims, then it certainly didn’t cause theirs. Under Texas law, toxic tort plaintiffs must...more
From medical devices to OTC drugs, preemption to expert preclusion, New York state and federal courts issued decisions in 2024 which further shaped the landscape in the medical and life sciences legal world. To prepare the...more
Federal Rule of Civil Procedure 26(a)(2) requires parties to disclose the opinions of experts who may present evidence at trial. If the disclosures are inadequate, Rule 37(c) requires exclusion of the opinions “unless the...more
Federal Rules of Evidence 701 and 702 govern the admissibility of lay and expert opinion testimony, respectively, in federal courts. Rule 701(c) helps paint the line between the two, providing that an opinion “based on...more
Precedential and Key Federal Circuit Opinions - WISCONSIN ALUMNI RESEARCH FOUNDATION v. APPLE INC. [OPINION] (2022-1884, 8/28/2024) (Prost, Taranto, and Chen) - Prost, J. The Court affirmed two final judgments of the...more
In patent litigation, expert witnesses play a crucial role in providing specialized knowledge to the court. In a recent case where Osseo Imaging LLC sued Planmeca USA Inc. for patent infringement, the Federal Circuit...more
When scientific evidence is in play, it is often assumed that the most frequently cited articles are published in the most elite journals. However, this is not necessarily true. A journal is ranked according to its impact...more
As patent practitioners know, Daubert motions can be some of the most hotly contested and pivotal motions in the life of a patent case. These motions are used to exclude testimony from an opponent's expert witness, usually on...more
In December 2023, back when the ink was still drying on the amendments to Federal Rule of Evidence 702, the Southern District of New York excluded all five general causation experts proffered by plaintiffs in the In re...more
US courts are issuing guidelines to ensure litigators disclose any use of generative AI in legal proceedings. By now, most of us have heard a story about the misuse of generative AI in the practice of law: the attorney...more
A recent decision by Judge Novak in a securities case provides some helpful reminders on expert witness practice, particularly in commercial litigation, in the EDVA....more
In explaining the December 2023 amendments to Federal Rule of Evidence 702, the Advisory Committee called out several ways in which “many courts” had “incorrectly” applied Rule 702 and failed to adequately discharge their...more
A recent decision by Senior District Judge Robert Payne on a Daubert motion in class action litigation against a pension fund offers some helpful lessons on challenging expert witnesses in the EDVA. Trauernicht v. Genworth...more
Expert testimony is the tool that enables litigators to elucidate concepts that require scientific, technical or specialized knowledge. However, a proponent cannot introduce expert testimony without demonstrating under F.R.E....more
On November 15, 2023, the New Jersey Supreme Court released its decision on the much anticipated issue of whether Drug Recognition Expert (DRE) testimony is admissible under New Jersey Rule of Evidence 702. The Court...more
On June 7, 2022, the Judicial Conference Committee on Rules of Practice and Procedure approved amendments to several of the Federal Rules of Evidence—including Rule 702, which governs the admissibility of expert witness...more
If you don’t know where a line is, you can’t say whether someone has crossed it. That principle applies in spades to expert witnesses, particularly when their role in the case calls on them to help the jury understand where...more
One notable opportunity associated with antitrust class action practice is the expert “hot tub,” which generally speaking is an in-court, on-the-record “debate” between dueling economists, with the court, parties, and experts...more
Though the pending amendments to Federal Rule of Evidence 702 have not taken effect officially yet, courts already have begun to cite them. Early signs indicate the potential that, consistent with the comments by the Advisory...more
Discovery deadlines exist for a reason. Although there are exceptions to every rule – and often a rule dictating how to handle such exceptions – litigants in federal court are expected to show their evidentiary cards in a...more
On opening an opinion, lawyers habitually roll their eyes when they see a table of contents. Even more so when they learn the opinion is over 300 pages. The MDL order granting defense motions to exclude experts and for...more
Another favorable DTI decision has been made in Meadors v. D’Agostino, a case from the United States District Court, Middle District of Louisiana (October 29, 2020). This case arose out of a car crash where the...more