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    • Zachary Margulis-Ohnuma
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Tess Cohen

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Tess Cohen is a criminal defense and civil rights attorney in New York City and of counsel to ZMO Law PLLC. Her practice focuses on defending complex fraud and narcotics cases, including health care fraud, mail fraud, wire fraud and narcotics conspiracies. She also handles wrongful convictions, and a variety of other criminal and civil matters in state and federal court.

Criminal Defense Attorney

Prior to joining ZMO Law PLLC, Ms. Cohen spent more than eight years as an assistant district attorney with the New York County District Attorney’s Office, where she was assigned to the Office of the Special Narcotics Prosecutor. Most recently, she served as the chief of the Prescription Drug Investigation Unit where she oversaw all the office’s work on prescription-drug related crimes, particularly investigations and prosecutions of medical practitioners selling prescriptions for controlled substances and the diversion of opioids from pharmacies and hospitals.

Ms. Cohen was lead prosecutor for numerous complex cases, including a thirteen-defendant oxycodone prescription and medicaid fraud conspiracy that involved allegations of more than $25 million worth of Medicaid fraud. She also handled the prosecution of a doctor who was charged with manslaughter due to the overdose death of two of his patients. She supervised prosecutors and analysts handling a wide array of prescription drug and health care fraud related cases. She has worked directly with a variety of state and federal law enforcement and regulatory agencies, including the NYS Office of Professional Medical Conduct, NYS Department of Education, NYS Bureau of Narcotics Enforcement, Office of Inspector General for Health + Hospitals, Office of the Medicaid Inspector General, NYC Human Resource’s Administration, the NYS Attorney General’s Office, New York State Insurance Fund, U.S. Department of Health and Human Services, as well as the DEA and NYPD.

As a result of her time as a prosecutor, Ms. Cohen has experience with investigative techniques used by law enforcement including wiretaps, confidential informants, and data analysis. She has conducted numerous hearings and trials, as well as complex motion practice and more than 100 grand jury presentations. She has worked extensively with individuals suffering from substance use disorder and their families. She is knowledgeable about drug treatment options offered throughout the state court system.

For her work, Ms. Cohen received the True American Hero Award from the Federal Drug Agents Foundation in 2019.  She has conducted numerous trainings related to investigating prescription drug crimes and health care fraud, including delivering a CLE on Prescription Drug Investigations at the New York Prosecutors’ Training Institute in July 2020.

Ms. Cohen graduated from Columbia Law School, where she was the recipient of the Lowenstein Fellowship given to a small number of graduates each year who are dedicated to working in public interest law. She also received the Jane Marks Murphy Prize for excellence in clinical advocacy. She has worked with principal attorney Zachary Margulis-Ohnuma in a variety of professional settings for more than a decade. As a law student intern in 2010, she uncovered crucial evidence that helped lead to the exoneration of Antonio Yarbough four years later.

She is also active in criminal justice policy work at the New York City Bar Association. She is the chair of the City Bar’s Criminal Justice Operations Committee and a member of the Mass Incarceration Task Force. She was a fellow in the 2018 Women in Power program at the 92nd Street Y. Ms. Cohen’s experience as a prosecutor combined with her demonstrated devotion to the rights of those accused of crimes and sensitivity to the injustices in our criminal justice system make her an ideal complement to our team of client-focused, trial-ready criminal defense lawyers.

ZMO Law PLLC Attorneys
  • Zachary Margulis-Ohnuma
  • Tess Cohen
  • Shane Finn
Contact ZMO Law
Latest Blogs By Tess Cohen
  • Governor Hochul vetoed bills aimed to curb police misconduct and overturn wrongful convictions
  • New Yorkers Get a Second Chance with the Clean Slate Act
  • The Power of a Defense Expert

ZMO Law In the News

January 16, 2026
NOTUS: The Case Against Nicolás Maduro Will Rely on a Myriad of Corrupt, Jailed Venezuelan Officials
Prosecutors preparing the criminal case against ousted Venezuelan leader Nicolás Maduro in Manhattan are expected to rely heavily on testimony from corrupt, jailed drug traffickers and military officials who have cut deals with U.S. authorities as cooperating witnesses. Many of these informants have credibility issues, a point underscored by defense attorney Tess Cohen, who noted ...
January 16, 2026
AMNY: A ‘snatch and grab’: Why legal observers question legality of Maduro capture, and how that’s expected to play into court arguments
As Venezuelan leader Nicolás Maduro faces U.S. prosecution after his capture and arraignment in New York, legal experts expect his defense to challenge the manner of his “snatch and grab” seizure and raise head-of-state immunity and evidentiary issues. Defense attorney Zachary Margulis-Ohnuma told amNY Law that Maduro’s team may argue the U.S. action was unlawful ...
January 16, 2026
Reuters: Maduro’s immunity claim tests US power to prosecute foreign leader
U.S. prosecutors and a federal court are facing a rare legal test after Venezuelan leader Nicolás Maduro pleaded not guilty in New York to narco-terrorism and related charges and asserted head-of-state immunity. The central question is whether Maduro can claim traditional immunity protections, with U.S. officials arguing he isn’t recognized as Venezuela’s president and defense ...
December 3, 2025
Buffalo News: Judge dismisses charges against ZMO Law client in 1993 Tonawanda murder
In court just last week, Erie County prosecutors asked a judge to reinstate James Pugh’s convictions for a 1993 City of Tonawanda homicide. As Pugh’s retrial was about to begin, the District Attorney’s Office asked for the opposite – that the charges be dropped. On Tuesday, the judge said yes to the latter. State Supreme ...
December 3, 2025
New York Times: Prosecutors drop murder case against ZMO Law client who served more than 26 years
James Pugh, one of two men originally convicted in the savage killing of Deborah Meindl near Buffalo in 1993, said all along that he was innocent. Mr. Pugh, 63, was convicted in 1994 of the savage murder of Deborah Meindl, a woman with two young children who was discovered stabbed and strangled in her home ...

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353 Lexington Avenue, Suite 900
New York, NY 10016
Phone: (212) 685-0999

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