N.Y. Crim. Proc. Law § 60.76
Where disclosure of a communication which would have been privileged pursuant to section forty-five hundred ten of the civil practice law and rules is sought on the grounds that the privilege has been waived or that disclosure is required pursuant to the constitution of this state or the United States, the party seeking disclosure must file a written motion supported by an affidavit containing specific factual allegations providing grounds that disclosure is required. Upon the filing of such motion and affidavit, the court shall conduct an in camera review of the communication outside the presence of the jury and of counsel for all parties in order to determine whether disclosure of any portion of the communication is required.
N.Y. Crim. Proc. Law § 60.76