The Second Department determined expert testimony about “adolescent sexual abuse” was properly admitted in a sex-crime trial to explain delay in reporting, imprecise memory, accommodation, and a “flat affect” during testimony:

“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'” … . “[E]xpert testimony regarding rape trauma syndrome, abused child syndrome or similar conditions may be admitted to explain behavior of a victim that might appear unusual or that jurors may not be expected to understand” … . The expert’s testimony was properly admitted to explain the issue of delayed disclosure and to counter the defense claim that the complainant fabricated the sexual abuse allegations when her parents objected to her having a boyfriend … . The testimony was also properly admitted to explain why the complainant did not recall with specificity when certain of the alleged incidents occurred, and why victims of adolescent sexual abuse may manifest a “flat affect” when testifying. The testimony was “general in nature and does not attempt to impermissibly prove that the charged crimes occurred” … . To the extent the expert testified as to an abuser’s behavior patterns, such testimony was admissible to help explain “why victims may accommodate abusers and why they wait before disclosing the abuse” … . People v Gopaul, 2013 NY Slip Op 08659, 2nd Dept 12-26-13