Jeffrey A. Denner

Jeffrey A. Denner

Founding Partner

Location: Boston, Massachusetts
Phone: 617-500-4398
866-370-5422 (Toll Free)
Fax: 617-973-1562
Email: E-mail Me

Attorney Jeffrey A. Denner is a founder and partner of Denner Criminal Defense Group, Counselors At Law. For over 30 years, Mr. Denner has concentrated his practice in the defense of complex, often high profile criminal cases on behalf of individuals and organizations throughout both the United States and internationally. He also involves himself in selected civil cases, particularly for individuals whose civil rights have been violated by the Government.

Mr. Denner’s practice encompasses both trials and appeals in the state and federal court systems as well as before administrative (licensing, regulatory and disciplinary) boards and agencies. His legal representation commences at the investigative, pre-indictment/pre-charging stage and carries through to appeal, post-conviction, and parole/ pre-release, as applicable.

A graduate of Yale College and Harvard Law School, Mr.Denner has been a partner in several larger Boston Law Firms during his approximately 35-year career. He and many of his cases have been profiled in local and national television shows, newspaper accounts, and magazine articles. He has also been a legal commentator for various local and national television shows. Mr. Denner is admitted to practice in the Commonwealth of Massachusetts, the (federal) United States District Court for Massachusetts, the (federal) First Circuit Court of Appeals, the United States Court of Military Appeals, the United States Claims Court, the United States Tax Court, and the United States Supreme Court. He has also litigated cases in approximately 35-40 state and federal jurisdictions at the trial or appellate levels in the United States, as well as in Canada, Asia, Central America, and Western Europe.

Mr. Denner is a member of the Massachusetts Bar Association, the National Association of Criminal Defense Attorneys, and the Massachusetts Association of Criminal Defense Attorneys. He is a former clinical Teaching Fellow at the Harvard Law School. He truly has made a motto of the National Association of Criminal Defense Attorneys – that “the Criminal Defense Lawyer is the last bastion of freedom in this country,” into a central theme of his own practice and life.

Jeffrey Denner combines his extraordinary training, experience and ability with a compassion and commitment to excellence which, assisted by his partners, associates and forensic expert resources, places clients into the best position to successfully resolve their problems. Mr. Denner also communicates frequently with his clients, as he strongly believes that such interaction is necessary to obtain the best results.

Mr. Denner can be reached 24-hours daily, 7 days per week at 866-370-5422 or 617-500-4398 to address your legal problems whatever, and wherever, they may be.

Bar Admissions

  • Massachusetts
  • U.S. District Court District of Massachusetts
  • U.S. Court of Appeals 1st Circuit
  • U.S. Army Court of Criminal Appeals
  • U.S. Court of Federal Claims
  • U.S. Supreme Court
  • U.S. Tax Court


  • Harvard Law School, Cambridge, Massachusetts
    • J.D. – 1973
  • Yale University
    • B.A. – 1969

Representative Cases

  • McIntyre v. U.S., 254 F.Supp.2d 183 (D.Mass. 2003)
  • U.S. v. Rodriguez, 53 F.3d 327, 1995 WL 253071 (1st Cir.(Mass.) 1995)
  • U.S. v. Olivier-Diaz, 13 F.3d 1 (1st Cir.(Me.) 1993)
  • In re Extradition of Howard, 996 F.2d 1320 (1st. Cir.(Mass.) 1993)
  • State v. Tarsitano, 134 N.H. 730, 599 A.2d 474 (N.H. 1991)
  • U.S. v. Moreno, 947 F.2d 7 (1st Cir.(Me.) 1991)
  • U.S. v. Sabatino, 943 F.2d 94 (1st Cir.(Me.) 1991)
  • U.S. v. Hallock, 941 F.2d 36 (1st Cir.(Me.) 1991)
  • U.S. v. McMahon, 938 F.2d 1501, 34 Fed. R. Evid. Serv. 516 (1st Cir.(N.H.) 1991)
  • U.S. v. Cambara, 902 F.2d 144 (1st Cir.(Mass.) 1990)
  • U.S. v. Santana, 895 F.2d 850 (1st Cir.(N.H.) 1990)
  • Aiken v. Seifert, 1989 WL 32153 (D.Mass. 1989)
  • U.S. v. Tedeschi, 774 F.2d 511 (1st Cir.(Mass.) 1985)
  • Detenber v. Turnage, 701 F.2d 233 (1st Cir.(Mass.) 1983)
  • Withum v. O’Connor, 506 F.Supp. 1374 (D.Puerto Rico 1981)
  • Socialist Workers Party v. Davoren, 378 F.Supp. 1245 (D.Mass 1974)
  • U.S. v. Martinez, 102 F.Supp.2d 39 (D.Mass. 2000)
  • U.S. v. Brito, 103 F.Supp.2d 42 (D.Mass. 2000)
  • U.S. v. Nachef, 1998 WL 151270 (D.Mass. 1998)
  • Com. v. Selby, 426 Mass. 168, 686 N.E.2d 1316 (Mass. 1997)
  • U.S. v. Skodnek,, 933 F.Supp. 1108 (D.Mass. 1996)
  • Kettenbach v. Demoulas, 901 F.Supp. 486 (D.Mass. 1995)
  • U.S. v. Chan, 901 F.Supp. 480 (D.Mass. 1995)
  • U.S. v. Arboleda, 929 F.2d 858, 32 Fed. R. Evid. Serv. 1164 (1st Cir.(N.H.) 1991)
  • Craft v. Hodel, 683 F.Supp. 289 (D.Mass. 1988)
  • U.S. v. Porter, 764 F.2d 1 (1st Cir.(Mass.) 1985)
  • State v. Andrews, 125 N.H. 158, 480 A.2d 889 (N.H. 1984)
  • State v. Burke, 427 A.2d 1302 (R.I. 1981)
  • U. S. v. Rexroad, 9 M.J. 959 (AFCMR 1980)


  • Former Clinical Teaching Associate, Suffolk University

Honors and Awards

  • Former Clinical Teaching Fellow, Harvard University

Professional Associations and Memberships

  • Massachusetts Bar Association, Member
  • National Association of Criminal Defense Attorneys, Member
  • Massachusetts Association of Criminal Defense Lawyers, Member


  • Spanish

Featured Cases

Mistrial Declared, All Charges Dismissed in MA State Treasurer Corruption Case (Commonwealth of Massachusetts vs. Timothy Cahill)

Family of Woman Killed in “Big Dig” Tunnel Collapse Awarded $28.1 Million (Estate of Del Valle v. Multiple Defendants)

All Charges in High-Profile Murder Case Dismissed; Defendant Awarded in Excess of $400,000 for Prosecutorial Error (Commonwealth of Massachusetts v. Edmund Burke)

Hotly contested, high-profile, multi-week federal trial concludes with veteran MA police officer found Not Guilty. (U.S. vs. LaFleur)

Read more about other Denner Criminal Defense Group successes

Contact the Denner Criminal Defense Group

For aggressive representation and sound legal counsel, contact the Denner Criminal Defense Group. We are highly experienced in a wide range of practice areas, including criminal law, white collar crimes and the ensuing civil consequences of those crimes. Our team advocates for clients in even the most complex and high-profile cases.

Call Our Boston Law Offices 866-370-5422

For a consultation, call us toll-free at 866-370-5422. We welcome clients who speak languages other than English, including Spanish, Portuguese, Russian, and some South Asian languages. Calls are answered 24 hours a day, seven days a week.

Boston Criminal Defense Attorneys

The Denner Criminal Defense Group is a nationally recognized law firm with an accomplished team of defense attorneys, investigators, and forensic experts. We are known for our aggressive criminal defense representation and unwavering commitment to our clients.

Denner Criminal Defense Group

4 Longfellow Place, 35th Floor
Boston, MA 02114
Phone: 617-227-2800
Fax: 617-973-1562
Boston Law Office