In an opinion by Judge Pigott, the Court of Appeals affirmed the appellate division’s reversal of defendant’s sexual abuse convictions.  The Court of Appeals disagreed with the appellate division and determined expert testimony allowed by the trial court about how sexual abusers gain the trust of their victims was admissible. But the Court of Appeals went on to find (agreeing with the appellate division) that the trial court’s exclusion of testimony (by Martinez) about the complainant’s prior allegedly false accusations of sexual abuse was reversible error.  On these two issues, Judge Pigott wrote:

Expert testimony is properly admitted if it helps to “clarify an issue calling for professional or technical knowledge, possessed by the expert and beyond the ken of the typical juror” … . Here, it was not an abuse of discretion for the trial court to permit expert testimony regarding the behavior of sexual abusers. That testimony is permissible as helpful for the jury to understand victims’ unusual behavior … . Although some of the testimony discussed behavior similar to that alleged by the complainant in this case, the expert spoke of such behavior in general terms … . In addition, the jury heard the expert testify that she was not aware of the facts of the particular case, did not speak with the complainant and was not rendering an opinion as to whether sexual abuse took place.

We agree with the Appellate Division, however, that the proffered testimony of Martinez should have been permitted at trial. Evidence of a complainant’s prior false allegations of sexual abuse is not inadmissible as a matter of law . Rather, it may be permitted if the prior allegations “suggest a pattern casting substantial doubt on the validity of the charges” … .

Here, Martinez’s proposed testimony went to a material issue of defendant’s defense, namely, whether the complainant had a history of making false allegations of sexual abuse by family members. Defense counsel sought to introduce the testimony as a prior inconsistent statement; to confront the complainant’s testimony that she never made an allegation against Martinez and to rebut the testimony of the complainant’s mother who testified she was unaware of any accusation made by complainant against Martinez. These statements opened the door to Martinez’s rebuttal, which, if believed, suggested that the testimony of the complainant and her mother were not credible.  People v Diaz, 52, CtApp 3-26-13