Category Archives: Experts – Reliability

Amendments to Federal Rule of Evidence 702 – Expert Testimony


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In April, the Supreme Court sent a list of proposed amendments to Congress that amend the Federal Rules of Evidence. Absent action by Congress, the rules go into effect December 1, 2023.  The proposed amendments affect Rules 106, 615 and, relevant to this article, 702.

Rule 702 addresses testimony by an expert witness. The proposed rule reads as follows (new material is underlined; matters omitted are lined through):

A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if the proponent demonstrates to the court that it is more likely than not that:

(a) the expert’s scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue;

(b) the testimony is based on sufficient facts or data;

(c) the testimony is the product of reliable principles and methods; and

(d) the expert has reliably applied expert’s opinion reflects a reliable application of the principles and methods to the facts of the case.

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Mind Over Matter: Court Finds Expert Opinion Based on NFPA 921 Reliable Despite Absence of Physical Testing


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In Smith v. Spectrum Brands, Inc., 2022 U.S. Dist. LEXIS 142262, the United States District Court for the Eastern District of Pennsylvania (District Court) considered whether the plaintiffs’ liability expert met the requirements of Rule 702 of the Federal Rules of Evidence and could testify that a filter pump for an aquarium tank was defectively designed and caused a fire at the plaintiffs’ home. The defendant filed a motion to exclude the plaintiffs’ liability expert on grounds that the expert’s opinion did not satisfy the reliability element of Rule 702 because the expert never conducted physical testing on the filter pump. The court found that the cognitive testing employed by the expert through various methods, including visual inspections of the evidence, a review of photographs of the scene and literature from the manufacturer, and research on similar products, was sufficiently reliable to admit his opinion. Continue reading

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