Third Circuit Upholds Exclusion of Plaintiff's Causation Expert


The Third Circuit last week affirmed the exclusion of expert testimony in a toxic tort suit in which plaintiff alleged defendants' insecticide products gave him non-Hodgkin's lymphoma. Pritchard v. Dow AgroSciences, et al., No.10-2168 (3d Cir. 2011).

Plaintiff claimed that he contracted cancer from a pesticide produced by defendant Dow AgroSciences. His wife claimed to have suffered derivative injuries. In support of their complaint, the Pritchards solicited the expert testimony of Dr. Bennet I. Omalu, who provided the District Court with a report and, later, a declaration, stating that Dursban caused the cancer. Although the trial court found Dr. Omalu to be a qualified expert, it ruled (on Dow's motion) that his proposed testimony was unreliable and therefore inadmissible at trial under Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993). The exclusion of Dr. Omalu's testimony doomed the lawsuit, because plaintiffs had no other evidence of causation. Plaintiffs appealed.

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