N.Y. Judiciary Law § 493: Attorneys forbidden to defend criminal prosecutions carried on by their partners, or formerly by themselves

§ 493. Attorneys forbidden to defend criminal prosecutions carried on

by their partners, or formerly by themselves. An attorney, who directly

or indirectly advises in relation to, or aids or promotes the defense of

any action or proceeding in any court, the prosecution of which is

carried on, aided or promoted by a person as district attorney or other

public prosecutor, with whom such attorney is directly or indirectly

connected as a partner; or who, having himself prosecuted or in any

manner aided or promoted any action of proceeding in any court, as

district attorney or other public prosecutor, afterwards directly or

indirectly advises in relation to, or takes any part in, the defense

thereof, as attorney or otherwise; or who takes or receives any valuable

consideration from or on behalf of any defendant in any such action,

upon any understanding or agreement whatever, express or implied, having

relation to the defense thereof, is guilty of a misdemeanor.