Harmless error.Snowden v. Singletary, 135 F.3d 732 (11th Cir. 1998)Permitting an expert witness to testify that 99.5% of children tell the truth in child abuse cases was a denial of fundamental fairness and in the circumstances of this case, where the child's credibility was the central issue, required setting aside the conviction.United States v. Cruz, 981 F.2d 659 (2d Cir. 1992)Expert testimony in this case was improper for two reasons: (1) the expert testified that the area of the drug transaction was heavily Hispanic and “drug-inundated.” Because all the defendants were Hispanic, this was improper and prejudicial; (2) the defendant claimed he was not on the scene; the expert testified that the conduct of the defendant as described by witnesses was characteristic of a drug broker.