200 Vanderbilt Motor Parkway, Suite C-17, Hauppauge, New York 11788

Brendan M. Ahern


631-231-1199 phone

631-300-4380 fax

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Brendan M. Ahern is an experienced and highly qualified trial attorney that focuses primarily on criminal defense in the New York State and Federal courts. Mr. Ahern is routinely sought out to defend and litigate complex, high-stakes criminal matters, drawing upon his unique wealth of experience, as a former senior homicide prosecutor and Deputy Bureau Chief of the District Attorney’s Office, for the benefit of his clients. In addition to criminal defense, Mr. Ahern has demonstrated  his expertise in accident investigation and reconstruction in civil wrongful death and personal injury cases.

Former Homicide Prosecutor and Deputy Chief

Prior to joining Reynolds, Caronia, Gianelli & La Pinta, P.C. as a Partner in 2015, Mr. Ahern was the senior homicide prosecutor for the Nassau County District Attorney’s Office Vehicular Crimes Bureau- assigned to investigate and prosecute the most high-profile vehicular homicides, from Vehicular Manslaughter to Murder. Additionally, he was a Supervisor and Deputy Bureau  Chief, responsible for  the supervision and training of prosecutors in all DWI and vehicular crimes prosecutions in Nassau County District Court Throughout this time, he trained with experts in the fields  of  accident  investigation, accident reconstruction, and forensic toxicology.


Mr. Ahern frequently trained prosecutors and police officers in the handling of criminal matters from the investigation stage through trial. He was appointed an Instructor for the New York State Prosecutor’s Training Institute (NYPTI), a primary training college for prosecutors across New  York State. Since entering private practice, he has been sought after to train criminal defense attorneys in areas from DWI to Vehicular Homicide in New York City and Long Island, including the Appellate Division First Department Assigned Defender Association and Suffolk County Criminal Courts Bar Association. Additionally, he has served as an expert consultant on homicides in cases from New York to  California.

Mr. Ahern was hired by Hofstra University School of Law as a Special Professor of Law and Adjunct Faculty in the discipline of Trial Advocacy. He has repeatedly been requested by Hofstra University School of Law and Touro University Law School faculty to provide demonstrations of trial skills to Evidence and Criminal Law classes.

Education and Background

Mr. Ahern was born and raised in Suffolk County, where he presently resides. Following his graduation from Sayville High School, he was accepted into Villanova University’s prestigious Honors Program. He graduated with a Bachelor of Art degree in Political Science in 2001. Following his college graduation, Mr. Ahem accepted a position working overseas, in Japan. Upon his return to the United States, Mr. Ahern worked as a consultant to major Japanese subsidiaries concentrating on human resources management and employment law.

In 2007, Mr. Ahern graduated from Hofstra University School of Law with the distinction of  being awarded the Judge Edward J. Hart Memorial Scholarship for Trial Advocacy in recognition for his performance in several regional and national trial competitions.

Awards, Recognition, and Affiliations

Mr. Ahern earned a “Superb” rating with Avvo.com, an online attorney client review and peer review rating resource. He was awarded the prestigious 2015 “Top 10 DUI/DWI Attorneys in New York State” from the American Institute of DUI/DWI Attorneys, and the 2015 “Top 10 Under 40” Attorney Award from the National Academy of Criminal Defense Attorneys. Additionally, he was nominated as a Rising Star to Super Lawyers. He was recognized by the Nassau County Police Department Homicide Bureau with a Citation for Excellence and by the Nassau County Executive for meritorious service.

Mr. Ahern is a member of the National College of DUI/DWI Attorneys, American Institute of DUI/DWI Attorneys, National Academy of Criminal Defense Attorneys, and the Nassau County, Suffolk County, and New York State Bar Associations. He is admitted to practice law in New York State and the Eastern District of New York Federal Court.


Contact us today for a free consultation on your criminal law or traffic violation matter

Call Reynolds, Caronia, Gianelli & La Pinta, P.C. at 631-231-1199 or contact us online today to set up a free initial consultation today. Our Hauppauge, New York office offers ample parking and is open weekdays from 9 a.m. to 6 p.m. Weekend and evening appointments are available.


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