N.Y. Civil Practice Law & Rules § 4513: Competency of person convicted of crime

§ 4513. Competency of person convicted of crime. A person who has been

convicted of a crime is a competent witness; but the conviction may be

proved, for the purpose of affecting the weight of his testimony, either

by cross-examination, upon which he shall be required to answer any

relevant question, or by the record. The party cross-examining is not

concluded by such person's answer.