About David Brian
David Brian Deitch is a attorney specializing in criminal law, business law, securities law, stockbroker and investment fraud, and white-collar crime. He leads the White Collar Defense and Corporate Compliance practice at Berenzweig Leonard LLP in McLean, Virginia. With over 30 years of experience, David has tried more than 100 jury trials in federal and state courts nationwide. His practice encompasses criminal defense, civil, regulatory, and administrative matters, drawing from his extensive background as both a state and federal prosecutor and as defense counsel for prominent businesses and individuals. David earned his Juris Doctor from New York University School of Law in 1988 and his Bachelor of Arts in Law and Society from Brown University in 1985. He is admitted to practice in Massachusetts, New York, and Virginia.
In Virginia, he is a member of the Virginia State Bar, holding license number 74818 — Before joining Berenzweig Leonard, David served in various prosecutorial roles. He was an Assistant District Attorney in Manhattan (1992-1995), an Associate Independent Counsel in the Office of Independent Counsel Carol Elder Bruce (1998-1999), and an Assistant U.S. Attorney in the District of Columbia (1999-2003). From 2003 to 2007, he was part of the U.S. Department of Justice's Counterterrorism Section, where he coordinated counterterrorism investigations and prosecutions for 17 U.S. Attorney’s Offices.
In 2004, he received the Assistant Attorney General’s Award for Advancing National Security. At Berenzweig Leonard, David has achieved notable successes. He secured a $20 million jury award for the Learning Annex in federal court in New York and later won a larger verdict of $21.8 million on retrial. He also represented a media company in New York federal court, leading to the dismissal of civil allegations and an award of attorneys’ fees for the client. Additionally, he defended a client indicted in New York state court for enterprise corruption, resulting in a plea to a class B misdemeanor, the lowest level criminal offense in the New York state code. David is recognized for his contributions to the legal field.
He was listed in Virginia Super Lawyers in Criminal Defense: White Collar in 2022 and named a Top Lawyer in Criminal Defense by Northern Virginia Magazine in 2020-2021. He has been included in Virginia Business Legal Elite for Criminal Law from 2019 to 2021 and recognized by the National Trial Lawyers as a Top 100 Criminal Defense attorney in Virginia in 2019. He is an active member of several professional organizations, including the George Mason American Inn of Court. He serves as a Master of the Bench, the Federal Bar Association's Northern Virginia Chapter, and the Fairfax Bar Association's Criminal Law Section. David also holds memberships in the DC Bar's Criminal Law and Individual Rights Community.
