In a prosecution for aggravated child sexual abuse in which the alleged victim has inconsistently reported abuses, may the prosecution present expert testimony that such behavior is consistent with the alleged victim telling the truth, even though similar testimony is excluded when it would favor defendants because it "inevitably would encroach upon" the jury's exclusive role to determine the credibility of witnesses?

Whether expert testimony that an alleged child victim's inconsistent reporting of abuse is consistent with truthfulness is admissible under Federal Rule of Evidence 702(a)