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Kevin J Mahoney

About me

Attorney Mahoney has won 52 of his last 55 trials* and has been lead counsel in more than 100 trials and appeals. Considered a master cross-examiner, his book "Relentless Criminal Cross-Examination" is a best seller. Fellow lawyers, court personnel, police officers, physicians, MIT and Harvard professors, a former top-level Pentagon official, and a rock star, as well as the poor, the downtrodden and reviled have entrusted Mahoney with safeguarding their liberty. Because of his impressive trial record and his willingness to tee it up, prosecutors frequently offer his clients very favorable plea bargains.


In his spare time, Mahoney can be found backpacking through the White Mountains, Glacier National Park or remote areas of Iceland, deer hunting in Pennsylvania, running along the Charles River, hiking the rain forests of Costa Rica, living it up in Reykjavik, or competing in No-Limit Texas Hold’em poker tournaments.


Languages spoken: Spanish, Portuguese

Photos and videos

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Practice areas


  1. Criminal Defense: 50%
    24 years, 5 thousand cases
  2. Litigation: 30%
    24 years, 25 cases
  3. DUI & DWI: 15%
    24 years, 500 cases
  4. Appeals: 5%
    24 years, 100 cases



Fixed (sometimes), Retainer (always), Free consultation (30 minutes)

Payment types:


Attorney endorsements

4 total 

Are you an attorney? Endorse this lawyer

  • David R Yannetti

    I have known Kevin since the early 1990's, when we were colleagues together at the Middlesex District Attorney's Office. As criminal defense attorneys, we have represented co-defendants in a high-profile perjury case. I have found Kevin to be a well-prepared, articulate fighter for his clients. I enthusiastically endorse him for those seeking representation for a criminal defense matter.


    David Yannetti Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • David James Reger Ionson

    I have had the pleasure of working with Attorney Mahoney on various cases and routinely solicit Attorney's Mahoney's council on litigation matters. Attorney Mahoney relentlessly and diligently represents his clients using the full extent of his vast abilities. Drawing upon his comprehensive trial experience combined with a brilliant legal mind and meticulous attention to detail make Attorney Mahoney a powerhouse in the courtroom and across the negotiation table. I would recommend Attorney Mahoney without reservation.


    David Ionson Business Attorney
    Relationship: Worked together on matter

Contact info

Mahoney Criminal Defense Group

545 Concord Avenue
Suite 22
Cambridge, MA, 02138


NYCurrently registered 200603/07/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 100 Trial LawyersNational Trial Lawyers2016
Top 100 Trial LawyersNational Trial Lawyers2014
Top 100 Trial LawyersNational Trial Lawyers2013
Top 100 Trial LawyersNational Trial Lawyers2012
Top 100 Trial LawyersNational Trial Lawyers2011
The Top 100 Trial LawyersAmerican Trial Lawyers Association2010
The Top 100 Trial LawyersThe American Trial Lawyers Association2008
MemberNational Registry of Who's Who1999
ListedWho's Who Among American Law Students, 9th Ed.1989
American Jurisprudence Book Award for Advanced Trial PracticeNew England School of Law1989
ListedWho's Who Among American Law Students, 8th Ed.1988
Member, New England Law ReviewNew England School of Law1987
Work experience
TitleCompany nameDuration
On-Air Legal AnalystFox News2005 - Present
PresidentLaw Offices of Kevin J. Mahoney, PC1993 - Present
AssociateLecomte, Emanuelson, Tick & Doyle1993 - 1993
Assistant District AttorneyMiddlesex County District Attorney's Office1991 - 1993
Judicial Law ClerkConnecticut Superior Court1989 - 1990
Association namePosition nameDuration
American Bar AssociationMember2006 - Present
National Association of Criminal Defense LawyersLife Member1997 - Present
Massachusetts Association of Criminal Defense LawyersMember1997 - Present
Legal cases
Case nameOutcome
Mahoney Wins Verdict of $385,000.00Verdict for Plaintiff of $385,000.00
Commonwealth v. B.M.Not Guilty
Commonwealth vs. S.L.Not Guilty
See all legal cases 
Publication nameTitleDate
Relentless Criminal Cross-ExaminationRelentless Criminal Cross-Examination2008
New England Law ReviewUnited States vs. Stanley, Has the Feres Doctrine Become a Grant of Absolute Immunity?1990
School nameMajorDegreeGraduated
New England School of LawLawJD - Juris Doctor1989
University of Massachusetts, AmherstEnglishBA - Bachelor of Arts1986
Speaking engagements
Conference nameTitleDate
Inaugural ConferenceCross-Examination2011
Greater Boston, with Emily RooneyMahoney discusses the trial of Joseph Nee, who allegedly masterminded a Columbine style attack on Marshfield High School.2008
WCVBWCVB interviews Mahoney outside Framingham District Court following client’s arraignment on charge of motor vehicle homicide.2007
Fox News LiveMahoney analyzes developments in Duke rape case.2007
Fox News LiveMahoney analyzes three recent 1st Amendment cases pending before the Supreme Court.2007
Fox News LiveMahoney comments on prosecution’s forensic evidence against Phil Spector2007
Fox News LiveMahoney provides three hours of on-air coverage of breaking news on Bobby Cutts, Jr. arrest for the murder of Jessie Davis.2007
Fox News LiveMahoney analyzes prosecution’s case against Phil Spector.2007
Fox & FriendsMahoney discusses prosecutorial immunity from civil lawsuits with morning show in aftermath of dismissal of Duke Lacrosse rape charges.2007
Fox News LiveMahoney comments on Mary Winkler murder case2006
Fox News LiveMahoney discusses preferential treatment of Patrick Kennedy in OUI accident.2006
Fox News LiveMahoney analyzes Duke rape case.2006
Fox News LiveMahoney discusses Duke rape case.2006
Fox News LiveMahoney analyzes Duke rape case.2006
Fox News LiveMahoney analyzes Duke rape case.2006
Fox News LiveMahoney analyzes Duke rape case.2006
Fox News LiveMahoney discusses Duke rape case.2006
Fox News LiveMahoney comments on Duke rape case.2006
Fox News LiveMahoney examines Secret Service involvement in Angelina Jolie and Brad Pitt stolen baby photographs2006
Fox News LiveMahoney comments on JonBenet Ramsey murder investigation.2006
CNN/Nancy GraceMahoney defends Attorney Elliot Weinstein’s handling of Neil Entwistle’s murder case.2006
Forensic FilesCourtTV’s Forensic Files airs “Dessert Served Cold,” chronicling Mahoney’s successful defense of Christina Martin, dubbed the “Jell-O Murderer” by the national press.2004
CourtTV’s Catherine Crier LiveCourtTV’s Catherine Crier Live. Outside the Cambridge Superior Court, Mahoney discusses the prosecution’s case against Alexander Pring-Wilson, accused of stabbing victim to death.2004
CNNCNN interviews Mahoney on case against Martha Stewart.2004