Scientific or expert evidence is admissible only if the evidence is generally accepted by scientists or experts in the field to which the evidence belongs.

Malek v. Federal Insurance Co., 994 F.2d 49, 53 (2d Cir. 1993) (holding, in plaintiff insureds' action against defendant insurers for recovery of proceeds of a fire insurance policy, that the trial court erroneously....Document must have been prepared in the normal course of business.

United States v. Butterworth, 511 F.3d 71, 74-75 (1st Cir. 2007) (upholding trial court's admission of grand jury testimony of defendant's girlfriend to cross-examine her after she gave testimony that was inconsistent with....A prior statement is exempt from the federal hearsay rule and is admissible to prove the truth of the matter asserted by the declarant with the prior statement if the prior statement was made under oath in another proceeding and if the prior statement is inconsistent with the declararant's testimony or with the admitted hearsay statement of the declarant.

Rock v. Arkansas, 483 U.S. 44, pin? (1987).The exclusion of exculpatory evidence in a criminal trial does not violate the due constitutional right to present a defense if the grounds for exclusion are not arbitrary or disproportionate.