Beware the Gatekeeper

Admissibility of Expert Evidence and Disqualification Of Experts

The admissibility of expert testimony is a preliminary question of law for the court to determine. [Fed. R. Evid. 104(a); see also Celebrity Cruises, Inc., v. Essef Corp., 434 F. Supp. 2d 169, 175 (S.D.N.Y. 2006), citing Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 592, 113 S. Ct. 2786, 125 L. Ed. 2d 469 (1993)]. The proponent of the testimony bears the burden of demonstrating its admissibility by a preponderance of the evidence. Id. In order to be admissible, expert testimony must be relevant and based on a reliable foundation (Chartwell Liti-gation Trust v. Addus Healthcare, Inc. (In re Med Diversified, Inc.), 2006 Bankr. LEXIS 1677, 10 (Bankr. E.D.N.Y. 2006). Further, an expert must also be qualified as an expert in order for his or her testimony to be admissible as expert testimony. Id.). Expert evidence is relevant if it 'has any tendency to make the existence of any fact that is of consequence to the determination of the action more probable or less probable then it would be without the evidence.' (Fed. R. Evid. 401). Under Rule 702 of the Federal Rules of Evidence, expert testimony is reliable if: '(1) the testimony is based upon sufficient facts or data, (2) the testimony is the product of reliable principles and methods, and (3) the witness has applied the principles and methods reliably to the facts of the case.' Fed. R. Evid. 702; see also (In re Med Diversified, Inc) 2006 Bankr. LEXIS 1677, 10 (Bankr. E.D.N.Y. 2006).