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Louis Valvo

(212) 248-8800


Koster Brady & Nagler LLP
One Whitehall Street
New York , NY , 10004



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Received a Juris Doctor degree from New York Law School in 1987 which included a summer studying law at prestigious Oxford University in Oxford, England. He received his Bachelor of Science degree in Environmental Science from Long Island University-Southampton College in 1981.

Mr. Valvo began his legal career as an Assistant District Attorney under Robert M. Morgenthau in the Manhattan District Attorney’s Office. Mr. Valvo quickly established himself as an accomplished trial lawyer having tried numerous felony cases to a verdict and handling hundreds of grand jury matters. These successes led him to be selected to prosecute cases in the specialized firearms trafficking unit, where he led complex, long-term investigations into the illegal firearms trade. While at the Manhattan District Attorney’s Office, Mr. Valvo was promoted to prosecute homicide cases and was a member of the hiring committee.

Mr. Valvo joined Koster, Brady and Nagler as an associate in 1994, where he was responsible for all matters involving civil litigation, including medical malpractice, personal injury, products liability and white-collar criminal defense in federal and state courts. While at Koster, Brady and Nagler, Mr. Valvo was recruited to be the Chief Assistant District Attorney at the Rockland County District Attorney’s Office in 1996, a position that he held for twelve years.

As Chief Assistant District Attorney, Mr. Valvo was responsible for the management and supervision of a staff of 75 with an annual budget of $6.5 million. During his tenure at the Rockland County District Attorney Mr. Valvo prosecuted numerous high-profile cases, including homicide and violent crimes. In 1996, he was appointed as a Special Assistant United States Attorney and obtained a conviction after a trial of a nationally noted murder case in federal court.

These accomplishments earned Mr. Valvo many awards, including his selection as the 2004 Prosecutor of the Year in Trial Advocacy by the District Attorney’s Association of the State of New York. Mr. Valvo appeared regularly on television as a legal analyst, including Court TV and Hollywood Justice.  Mr. Valvo’s cases have been profiled in books and television, including A&E’s “City Confidential”, the Oxygen Network series “Snapped” and the Investigation Discovery Channel series “Deadly Women.” He was a faculty member for the National District Attorneys Association, American Prosecutors Research Institute and the International Association of Chiefs of Police. He has also appeared as a public speaker on important legal topics in law enforcement, civic and academic settings.

Mr. Valvo rejoined Koster, Brady and Nagler in 2008, as Senior Trial Counsel until his elevation to partner in 2009. He is responsible for the defense of personal injury, commercial litigation, medical malpractice, and premise liability cases in addition to criminal matters.  Mr. Valvo also represents clients in administrative and regulatory proceedings before local, state and federal agencies.  Mr. Valvo has successfully handled numerous trials in courts throughout New York, New Jersey and in federal court.  Additionally, Mr. Valvo obtained favorable results after his oral arguments in the New York Appellate Courts.

Mr. Valvo is admitted to practice before the Courts of the State of New York, State of New Jersey, the United States District Courts for the Southern and Eastern Districts of New York and the District of New Jersey.  He has earned a Distinguished rating from Martindale-Hubbell, which reflects a peer rating for strong legal ability and high ethical standards.

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