Background & Experience

Isabelle A. Kirshner is one of New York's premier criminal defense trial attorneys. She has won acquittals for her clients in both state and federal court. Isabelle has more than thirty years of experience defending individuals and entities in a wide range of criminal matters including investigations and prosecutions relating to securities fraud, money laundering, bank fraud, tax fraud, as well as distribution of crystal methamphetamine, opioids, and allegations of sexual misconduct. She has represented individuals at every stage of criminal proceedings, from the inception of a criminal investigation through indictment and trial.

Isabelle has tried cases involving a wide range of criminal charges, including one of the largest criminal tax shelter cases ever brought by the U.S. Department of Justice. Among her successes are an acquittal of murder and racketeering charges in a multi-defendant case in federal court, acquittal of all charges in a conspiracy case in which she successfully asserted an entrapment defense on behalf of her client, and an acquittal of all charges in a federal Hobbs Act and conspiracy case.

Isabelle served as an Assistant District Attorney in the Manhattan District Attorney’s Office from 1982 to 1986. Thereafter, she entered the private sector as a criminal defense attorney, and joined Clayman & Rosenberg LLP in 2005. Isabelle has lectured on federal and state criminal practice for a number of different bar organizations and is a long time faculty member of the Intensive Trial Advocacy Program at the Benjamin N. Cardozo School of Law.


-Represented a doctor accused of abusing patients which resulted in a non-jail disposition,

-Successful representation of a business owner accused of bank fraud involving the theft of over $300 million dollars

-Represented at trial a partner of one of the country’s big 4 accounting companies in a tax shelter case. Charges against the client were ultimately dismissed.

-Representation of a doctor accused of unlawful distribution of opioids.

-Persuaded the Special Prosecutor to decline to bring criminal charges against the former attorney general of the State of New York

-Represented a client in a large securities fraud case which resulted in a sentence that was almost half that of her co-defendant.

-Successfully represented an individual in a high-profile case in which charges resulted from an assault on an NYPD officer.

-Represented a number of individuals in different matters charged with the distribution of narcotics and crystal methamphetamine.

-Represented an individual indicted for bribing a high-level U.N. official. The client received a sentence well below the guidelines and was permitted to leave the country immediately after her release from custody.

-Achieved an acquittal of a client accused of a Hobbs Act murder in a major narcotics conspiracy in Federal Court.

-Represented an individual accused of misappropriating confidential banking information. No criminal charges were brought.

-Represented a number of individuals accused of a wide range of sexual misconduct.


Isabelle is a Fellow of the American College of Trial Lawyers (an organization comprised of the nation’s elite trial lawyers) and served as Chairperson of its Downstate Committee for two years. Since 2008 and every year thereafter, she has been selected as a "Super Lawyer" in the New York City Metro area. She is the 2018 recipient of the Equalizer Award from Gideon's Promise and, in 2019, was awarded the New York State Association of Criminal Defense Lawyers' Thurgood Marshall Practitioner of the Year Award.

Isabelle also sits on the Peer Review Committee for the Criminal Justice Act and the Criminal Justice Advocacy Board for the United States District Court for the Southern District of New York. She serves on the Central Screening Committee for the 18B Panel for New York County. She served as a member of District Attorney Cyrus Vance’s transition committee.


Isabelle is a graduate of the State University of New York College at Oswego and the Benjamin N. Cardozo School of Law.


Isabelle is admitted to practice in New York, the United States District Courts for the Southern and Eastern Districts of New York, and the Supreme Court of the United States.