The New York Court of Appeals yesterday in Parker v. Mobil Oil Corp., Inc. tackled the issue of the admissibility of expert witness testimony in a toxic tort context. In Parker, the plaintiff was diagnosed with acute myelogenuous leukemia ("AML"), and commenced a personal injury action against certain oil corporations. He alleged that he contracted AML as a result of his occupational exposure to gasoline containing benzene. The novel issue surrounds the admissibility of the plaintiff's expert witnesses, who attempted to establish the causal link between the plaintiff's exposure to the gasoline and his AML. The core evidentiary issue is to what extent the plaintiff was required to establish the precise level of his exposure to benzene to establish that his AML was caused by it through scientifically-reliable methodology. The Appellate Division, Second Department granted motions in limine to preclude the plaintiff's experts' opinions based on the speculative nature of their methodology.
Even though the Court of Appeals agreed that the expert testimony should be precluded, it parted ways with the Appellate Division on an important aspect of its reasoning. Importantly, the Court stated: "[W]e find it is not always necessary for a plaintiff to quantify exposure levels precisely or use the dose-response relationship, provided that whatever methods an expert uses to establish causation are generally accepted in the scientific community." This is an important holding because the Court made a policy decision in this case, determining that the concern regarding the difficulty of plaintiffs establishing their exposure to toxins outweighed the concern that juries might be faced with unreliable expert testimony in toxic tort cases.
As a side issue, the Court briefly addressed the Frye analysis, stating that the general acceptance analysis was at issue here. Selfishly, I hoped the Court would have had a more in-depth discussion on Frye, junk science, and the admissibility of expert testimony where there is a lack of foundation.
For additional discussion on the issue, see Nicole post on the case at Sui Generis.