Track Record of Success

Martin G. Weinberg, a nationally prominent criminal defense lawyer based in Boston, is ranked among the nation's best litigators and appellate advocates by many within the legal community. A 1971 Harvard Law School graduate, he has been recognized repeatedly for his accomplishments as a trial and appellate attorney, educator and legal expert. Since 1988, he's been selected by his peers for The Best Lawyers —Best criminal and white collar defense lawyer — including the 2019 edition. Weinberg was named One of the Top 10 Lawyers in Massachusetts in 2011. He has represented accused defendants in over 20 federal district courts, eight U.S. Courts of Appeal, and in the U.S. Supreme Court, where he successfully argued the landmark Fourth Amendment case of United States v. Chadwick. He is the former director of the National Association of Criminal Defense Lawyers.


Read 'Lawyer of the Year' interview. 

Skillful Defense for Diverse Cases

Martin G. Weinberg has been chief trial and appellate counsel in hundreds of cases for more than four decades. He's the lawyer of choice for industry leaders, including prominent trial attorneys, public officials, union leaders, corporate executives, health care executives, and internet pioneers. He has defended his clients on charges ranging from healthcare fraud, money laundering, RICO, internet gambling offenses, tax evasion, political corruption, securities fraud, insider trading, mail, wire and bank fraud, to racketeering, international gambling, drug smuggling, internet sex offenses, computer theft, and murder. He successfully challenged the Dept. of Justice’s reliance on the Stored Communications Act to seize the content of emails in violation of the Fourth Amendment (United States v Warshak). His experience includes organizing and directing case-specific teams of nationally selected attorneys, skilled forensic and traditional investigators, and specialized experts. Read interview: DiMasi-Vitale Trial.

Super Lawyers

“… prominent Boston defense lawyer”

Boston Globe, 5-30-19


“The No. 1 lawyer in the City.”
Howie Carr, Boston Herald, 6-16-11

“… a prominent defense lawyer in Boston”

New York Times, 4-8-15

“… a criminal defense lawyer of 
remarkable skill and persistence.”
Harvey Silverglate, 
Three Felonies a Day: How the Feds Target the Innocent

“Known for his savvy handling of  
high-profile, white-collar crime and tax cases.”
Boston Globe, 5-29-04, upon Weinberg 
joining Martha Stewart appellate team


Weinberg's expertise encompasses a broad spectrum of complex legal issues.
  • 2019 - Reversal of federal conviction in Puerto Rico of a business executive for bribery with the Court of Appeals ordering the entry of a judgment of acquittal,US v Bravo-Fernandez
  • Principal lawyer in successful, ground-breaking challenge to the Department of Justice’s 20-year history of seizing the content of emails through secret subpoenas to Internet Service Providers in circumvention of the Warrant Clause of the Fourth Amendment, United States v Warshak
  • Trial acquittals in recent political corruption case where the advisor for the Massachusetts Speaker of the House was charged and found not guilty by a jury in the DiMasi-Vitale trial
  • Trial acquittals in recent federal white collar racketeering conspiracy, tax evasion conspiracy, and money laundering trials for business executives and practicing attorneys
  • 2013 Court of Appeals reversal of federal public corruption conviction in Puerto Rico based on proof of gratuties but not bribery, United States v Bravo
  • Successful defenses of doctors, trial lawyers, hospital executives, CEOs of companies, and alleged organized crime leaders in a myriad of challenging cases over the past 40 years in eight federal courts of appeals and over 20 federal district courts from California and Florida to New England and New York
  • Appellate reversals in recent federal honest services case involving a hospital CEO accused of bribing a state politician and a business executive charged with money laundering
  • Representation of over 100 attorneys in matters including disqualification challenges, motions to quash grand jury subpoenas, contempt proceedings, and federal criminal prosecution for money laundering and obstruction of justice

Honors & Recognition

  • Top 10 Attorneys in the Commonwealth of Massachusetts: selected by Massachusetts Lawyers Weekly for 2011.
  • Best Lawyers: selected for inclusion in The Best Lawyers – since 1988 yearly – including the 2019 edition.
  • One of Top Lawyers in State: Weinberg was honored as One of the Top 10 Lawyers in Massachusetts in 2011 and has been selected yearly from 2004-2018 for Massachusetts Super Lawyers, a guide widely used by other lawyers to select counsel.
  • Weinberg has earned the 2019 Martindale-Hubbell®AV Preeminent™ Judicial Award, the highest rating in both legal ability and ethical standards, based on evaluations by other members of the bar and the judiciary in the United States and Canada.
  • Guest lecturer at Harvard Law School on criminal law and ethics issues.
  • Selected to be a panelist and speaker at four Judicial Conferences of the United States Court of Appeals for the First Circuit

Defender of The Constitution

“Marty Weinberg…[part of a] Fourth Amendment dream team [who] understands the Constitution and the Bill of Rights still reign as the supreme law of the land.” 

NACDL President Jim Lavine, 12-15-10
Upon 6th Circuit Court ruling that protected emails
from warrantless government surveillance

Martin G. Weinberg is “one of the deans of the defense bar.”

 — David Frank, Managing Editor,
Massachusetts Lawyers Weekly 10-21-13

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Groundbreaking Opinion

“The extension of the Fourth Amendment to emails is a groundbreaking opinion that is of pivotal importance in terms of protecting privacy in the Internet Age.”

—Weinberg quoted by AP following Warshak decision


“[Warshak] … may someday be seen as a watershed moment in the extension of our Constitutional rights to the Internet.”

— Law Professor Paul Ohm

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