Kevin J Mahoney

Kevin J Mahoney

4.9
Rating: 10.0

Licensed for 35 years

Criminal defense Lawyer at Cambridge, MA
Practice Areas: Criminal Defense, DUI & DWI, White Collar Crime ... +2 more

545 Concord Avenue, Suite 22, Cambridge, MA

About Kevin

Biography

Practice Areas

5

Practice Areas

Criminal Defense 65%

Mahoney has won 44 of his last 47 trials* and has been lead counsel in more than 100 trials and appeals. He regularly provides on-air legal analysis for Fox News Live, Fox & Friends, CNN, Nancy Grace, and Court TV's Catherine Crier Live. Court TV's Forensic Files chronicled his successful defense of Christina Martin, the "Jell-O Murderer." His new book, Relentless Criminal Cross-Examination is available from James Publishing Company.

33 years | 5,000 cases

65%
DUI and DWI 15%

Mahoney has been representing those accused of driving while intoxicated for almost two decades. He dedicated an entire chapter of his best selling book, Relentless Criminal Prosecution, to teaching lawyers how to cross-examine the police officer who arrested a driver for OUI.

33 years | 500 cases

15%
White Collar Crime 10%

Relying on a variety of forensic experts, Mahoney has won acquittals for those accused of embezzlement (allegedly over $400,000.00) and other white collar crimes.

33 years | 100 cases

10%
Animal Law 5%

Mahoney has developed a niche practicing representing individuals in custody disputes over pets, and defending those accused of stealing a domestic companion animal. He is also available to defend dogs at risk for being put down.

22 years | 5 cases

5%
Appeals 5%

Both as an Assistant District Attorney and as a Defense Lawyer, Mahoney has been successfully winning appeals before the Appeals Court and the Supreme Judicial Court. As an Editor of the New England Law Review and author of the best selling book on cross-examination, Relentless Criminal Cross-Examination, he has nearly unmatched writing and legal research skills.

33 years | 100 cases

5%

Fees and Rates

Cost

Free Consultation

$0 first 30 minutes

Retainer

Always


Payment Methods

  • Check

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Licenses

Licensed in Massachusetts for 35 years

State: Massachusetts

Acquired: 1989

Active

No misconduct found

Licensed in New York for 19 years

State: New York

Acquired: 2006

Resigned

No misconduct found

Licensed in District of Columbia for 33 years

State: District of Columbia

Acquired: 1992

Administratively Suspended - Non-Payment of Dues

No misconduct found

Location

Mahoney Criminal Defense Group

545 Concord Avenue, Suite 22, Cambridge, MA, 02138

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Kevin J Mahoney's Reviews

Avvo Review Score

4.9 /5.0

48 Client Reviews

5 star (47)
4 star (0)
3 star (0)
2 star (0)
1 star (1)

Posted by Danielle | September 15, 2023 | Hired Attorney

This review is from a person who hired this attorney.

Genuine, brilliant, simply the best.

It is difficult to find the words to describe the incredible work Attorney Mahoney did on my behalf. He represented me in a DUI case and I was absolutely terrified of how this might impact my family, my professional life and my personal life. Right from the start, Attorney Mahoney was attentive, pr...ofessional, compassionate, brilliant and incredibly detail-oriented (and has a great sense of humor). I had a lot of anxiety and worry about this experience and Attorney Mahoney offered constant reassurance and I never felt judged by him. He always took the time to explain things to me in a way that I could understand, and if I was having a difficult time understanding something, he would go over it again until he was certain I did. He put in hours upon hours of time on my case, and he never charged me beyond our original agreement. He pored over hours of video footage from the arrest after his work hours, would call me when he had a question, and prepared me for trial, leaving no stone unturned. He even engaged with me in a "mock" trial so I would know what to expect on the day my case went to trial. Ultimately, the charges against me were dropped because of the tireless work Attorney Mahoney did on my behalf. As a daughter of a lawyer, I can honestly say that Attorney Mahoney is the best out there. If you are looking to be represented by a lawyer, he is the one for you.

Kevin Mahoney

Replied last October 8, 2023

Thank you, Danielle, for the kind words. It was a pleasure to represent you and I am pleased that we were able to obtain for you the result you deserved. My warmest regards, Kevin J. Mahoney

Posted by anonymous | May 23, 2021 | Hired Attorney

This review is from a person who hired this attorney.

Absolutely Brilliant!

Mr. Mahoney is absolutely brilliant, hardworking, and goes above and beyond! I hired him to represent me in a restraining order case against an ex boyfriend. He spent a considerable amount of time preparing for the hearing, on short notice. He analyzed a large number of text messages, screenshots, an...d documents and made sure I knew exactly what to expect during the hearing. He called on a Sunday evening, the night before the hearing, to see if I had any last-minute questions. I was anxious and asked him what type of questions I might be asked. He then spent 45 minutes conducting what seemed like a mock hearing. This made me much more comfortable and I felt well-prepared and confident. It eased a lot of nerves. Mr. Mahoney is a compassionate human being. There were many times when I called in anxious. He was patient, listened to my concerns, and addressed them all. He showed a great deal of empathy and understanding. He always kept me informed of every update, no matter how minor. He was reassuring, yet completely honest in his assessment of our chances at winning. Mr. Mahoney severely underestimated the amount of work he ended up putting in for this case and undercharged me. He estimated what’s necessary, but still put in a lot more time than that. It seemed he was accustomed to putting in whatever time is necessary to guarantee a win. His impressive reputation as a lawyer matters more to him than the compensation he receives and his competitive spirit won’t let him accept anything less than perfect preparation for and presentation at the hearing. We had agreed on a flat fee, but the case became more complicated as it progressed, as my ex sought custody of my pet in a separate hearing. What should’ve been over in a month dragged for close to a year. Mr. Mahoney remained professional and honored the flat fee. He never made me feel like I deserved any less of his time as a result, and did not hesitate to continue putting in 110% of the effort. His dedication and devotion to his work is unlike anything I’ve ever seen. He anticipated every possible thing that could go wrong, every argument that my ex or his lawyer could make, and every move they could conceive of. This kicked up my anxiety a bit, as I was constantly worried about the worst case scenario, but paid off well, as we were always steps ahead of everyone and everything. We won our case and by comparison to Mr. Mahoney, my ex’s lawyer seemed so incompetent. Mr. Mahoney had been preparing me for possible avenues that my ex’s lawyer could take, some of which would’ve been smart to do. Yet his lawyer never thought of or never attempted those options. My ex was also clearly un-prepared, as it seemed like some of his answers were not something that his lawyer had anticipated. Mr. Mahoney asked had me so many questions prior to the hearing, even when I was hesitant to go into painful or embarrassing experiences. He gave me the option to speak to his paralegal if I was comfortable or to type things out. He made sure he had all details, so that we were well-prepared and put together the strongest argument. I suspect that any lawyer would seem inept by comparison to Mr. Mahoney’s experience and dedication. It was so reassuring to have a great lawyer by my side! I did not know this prior to hiring Mr. Mahoney, but he is one of the top attorneys in the country (listed top 100 nationwide). He wrote a book on cross-examination and was featured in Forensic Files’ “Dessert Served Cold” episode. I thought I would see a short clip of him, but he actually was so central to the story, that his showing up alone was a major turning point. His work in that case was very impressive, but I think what’s most important is that it shows how willing he is to do diligent research that other lawyers might not be motivated enough to do. I am very confident that he is the best lawyer you could ever hire!

Posted by anonymous | May 26, 2020 | Hired Attorney

This review is from a person who hired this attorney.

11/10 would recommend

I found Attorney Mahoney during a google search. I went on multiple websites looking for legal advice/help since I had no idea what or how I needed to go about dealing with my troubles. I saw that his website said “relentless defense,” and that is exactly what I got. After seeing he wrote a book on c...riminal cross-examination it made me feel at ease when choosing to move forward with getting in contact with his office. If you’re looking for someone that will go to the ends with you, Mr. Mahoney is your man. When it came time to meeting for the first time in his office in Cambridge, I could tell that he was extremely well qualified. Everything was extremely professional, and well executed during the year or so that I was one of his clients. To make helping me easier, I wanted to make sure that he had all the information and necessary documents that I could get my hands on. He was surprised at how quickly I got everything together (within ~24 hours). When he put together statements, documents, etc. I always received a copy which made me feel more comfortable with how things would go once we appeared in court. When it came time to court appearances, I knew that I needed to put my best foot forward dressed in a pant suit. I didn’t need much counseling on how to appear in front of a judge, whether it be what I was wearing or my facial expression. Due to my own anxiety about being in a court house, I had a tendency to arrive an hour or so earlier than was expected. Mr. Mahoney always called to let me know of his whereabouts to ensure the fact that he was not going to be late. If traffic hit, and he knew he was going to be late, he always contacted the court so that I would not appear in front of a judge without him there; it was very comforting. Mr. Mahoney was also very succinct, articulate, and eloquent with how he talked to the judge. It made my anxiety about appearing in court fade. Since he’s worked as an attorney for a while, he’s been in front of many judges before. If he knew that all about the background of any of the judges I appeared before, he advised me to behave accordingly. His insight on judges around Boston made me feel confident that he knew exactly what he was doing. There were several times that he attempted to get in touch with the DA that had my case, Mr. Mahoney always kept me in the loop about these attempts as well; it made me feel well taken care of during a very difficult time in my life. When you read on his website that he’s had 50/53 wins in court, it is easy to see why he will have your best interest in mind, and you should go forth with hiring him. His paralegal, Ms. Nanour Bedoyan, was also just as helpful during my time using Mr. Mahoney’s services. She was on top of the case just as much as Mr. Mahoney. Over the past year or so that I have known and been in contact with Mr. Mahoney he has been nothing but professional and insightful. If you are looking for an attorney that will fight for you instead of against you, I strongly advise you choose Attorney Mahoney.

Posted by anonymous | May 23, 2020 | Hired Attorney

This review is from a person who hired this attorney.

Expertise, commitment, and determination

I hired attorney Mahoney to defend me against a Title IX accusation. It was, and is, incredibly important to have the best defense possible because Title IX does not afford one the same rights of due process that one would assume one would be given in a court of law. Attorney Mahoney helped me naviga...te this difficult process with his expertise that only comes from years of experience. He worked tirelessly (for example, returning calls well after 8pm on multiple occasions). Attorney Mahoney's passion and dedication to supporting the people he defends is incredibly apparent and drives his efforts. Thanks to Attorney Mahoney's invaluable counsel, we were able to win my case. Attorney Mahoney also has a knowledgeable and helpful staff who were fantastic.

Posted by anonymous | May 8, 2018 | Consulted Attorney

This review is from a potential client who consulted with this attorney.

Great advice

Had a consultation regarding an issue with my nursing license. He is very thorough, professional and knowledgeable. I was given great advice and he took time to listen and assist me with issuing a well composed statement. He instilled confidence in me and I am optimistic about the outcome. I will hir...e him in the future if indicated regarding this matter.

See All Client Reviews

Kevin J Mahoney's Lawyer Endorsements

Endorse Kevin
David R Yannetti headshot
David Yannetti

Criminal defense lawyer | Aug 07

Relationship: Fellow lawyer in community

"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 James Reger Ionson headshot
David Ionson

Lawsuits and disputes lawyer | Aug 18

Relationship: Worked together on matter

"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."

Michael S. Waddington headshot
Michael Waddington

Criminal defense lawyer | May 26

Relationship: Fellow lawyer in community

"I endorse Kevin. He is a highly skilled attorney that is well respected in the legal community."

Inna Rifman headshot
Inna Rifman

Criminal defense lawyer | Sep 15

Relationship: Fellow lawyer in community

"I endorse this lawyer.His responses on avvo evidence a deep understanding and knowledge of the law."

View All Endorsements
Joan Marie Legraw headshot
Joan Legraw

Litigation lawyer

David R Yannetti headshot
David Yannetti

Criminal defense lawyer

David James Reger Ionson headshot
David Ionson

Business lawyer

Experience

Rating:  10.0 (Superb)

Honors

2016

Top 100 Trial Lawyers, National Trial Lawyers

2015

Top 100 Trial Lawyers, National Trial Lawyers Association

2014

Top 100 Trial Lawyers, National Trial Lawyers

2013

Top 100 Trial Lawyers, National Trial Lawyers

2012

Top 100 Trial Lawyers, National Trial Lawyers

2011

Top 100 Trial Lawyers, National Trial Lawyers

2010

The Top 100 Trial Lawyers, American Trial Lawyers Association

2008

The Top 100 Trial Lawyers, The American Trial Lawyers Association

1999

Member, National Registry of Who's Who

1989

American Jurisprudence Book Award for Advanced Trial Practice, New England School of Law

1989

Listed, Who's Who Among American Law Students, 9th Ed.

1988

Listed, Who's Who Among American Law Students, 8th Ed.

1987

Member, New England Law Review, New England School of Law

Work Experience

2005 - Present

On-Air Legal Analyst, Fox News

1993 - Present

President, Law Offices of Kevin J. Mahoney, PC

1993 - 1993

Associate, Lecomte, Emanuelson, Tick & Doyle

1991 - 1993

Assistant District Attorney, Middlesex County District Attorney's Office

1989 - 1990

Judicial Law Clerk, Connecticut Superior Court

Associations

2006 - Present

American Bar Association

Member

1997 - Present

National Association of Criminal Defense Lawyers

Life Member

1997 - Present

Massachusetts Association of Criminal Defense Lawyers

Member

Sample of Legal Cases

Commonwealth v. F.S.

Not Guilty

Commonwealth v. DM

Not Guilty

Commonwealth v. B.M.

Not Guilty

Commonwealth vs. S.L.

Not Guilty

Commonwealth vs. J.R.

Dismissed

Commonwealth vs. J.R.

Dismissed, Not Guilty

Commonwealth vs. D.D.

Not Guilty

Commonwealth vs. D.D

Not Guilty

Commonwealth vs. W.T.

Not Guilty

Commonwealth vs. J.K.

Not Guilty

Commonwealth vs. M.P.F.

Not Guilty

Commonwealth vs. L.B.

Not Guilty

Commonwealth vs. J.R.

Not Guilty

Commonwealth vs. Matthew Lavoi

Not Guilty

Commonwealth vs. T.W.

Not Guilty

Commonwealth vs. John Doe

Not Guilty, Guilty

Commonwealth vs. J. M.

Not Guilty

Commonwealth vs. Ming Chen

Not Guilty

Commonwealth vs. Herman Medeiros

Not Guilty

Commonwealth vs. Corey M.

Dismissed

Commonwealth vs. Doug W.

Not Guilty

Commonwealth vs. Dion D.

Dismissed

Commonwealth vs. Gregory W.

Not Guilty

Commonwealth vs. Ed T.

Not Guilty

Commonwealth vs. John B.

Pled, Dismissed

Commonwealth vs. John Merlino

Not Guilty

Commonwealth vs. Heriberto T.

Not Guilty

Commonwealth vs. Cheryl C.

Not Guilty

Commonwealth vs. Marianne S.

Not Guilty

Commonwealth vs. Michael D.

Not Guilty, Guilty

Commonwealth vs. Deborah R.

Not Guilty, Guilty

Commonwealth vs. Raymond H.

Not Guilty

Commonwealth vs. William J. T.

Not Guilty

Commonwealth vs. George R.

Not Guilty

Commonwealth vs. James W.

Not Guilty

Commonwealth vs. Heriberto T.

Not Guilty

Commonwealth vs. Aldaberto O.

Not Guilty

Commonwealth vs. Edwin M.

Not Guilty

Commonwealth vs. Eliot M.

Not Guilty, Hung

Commonwealth vs. Robert R.

Guilty

Commonwealth vs. Michael K.

Not Guilty

Commonwealth vs. Terry K.

Guilty

Commonwealth vs. Gary B.

Not Guilty, Dismissed

Commonwealth vs. Andrew T.

Guilty

Commonwealth vs. Mark W.

Not Guilty

Commonwealth vs. Gary S.

Not Guilty

Commonwealth v. Edwin O.

Guilty

Mahoney Wins Verdict of $385,000.00

Verdict for Plaintiff of $385,000.00

See More Legal Cases

Education

1989

New England School of Law

JD - Juris Doctor

1986

University of Massachusetts, Amherst

BA - Bachelor of Arts

Speaking Engagements

2011

Inaugural Conference

Cross-Examination

2008

Greater Boston, with Emily Rooney

Mahoney discusses the trial of Joseph Nee, who allegedly masterminded a Columbine style attack on Marshfield High School.

2007

WCVB

WCVB interviews Mahoney outside Framingham District Court following client’s arraignment on charge of motor vehicle homicide.

2007

Fox News Live

Mahoney analyzes developments in Duke rape case.

2007

Fox News Live

Mahoney analyzes three recent 1st Amendment cases pending before the Supreme Court.

2007

Fox News Live

Mahoney comments on prosecution’s forensic evidence against Phil Spector

2007

Fox News Live

Mahoney provides three hours of on-air coverage of breaking news on Bobby Cutts, Jr. arrest for the murder of Jessie Davis.

2007

Fox News Live

Mahoney analyzes prosecution’s case against Phil Spector.

2007

Fox & Friends

Mahoney discusses prosecutorial immunity from civil lawsuits with morning show in aftermath of dismissal of Duke Lacrosse rape charges.

2006

Fox News Live

Mahoney comments on Mary Winkler murder case

2006

Fox News Live

Mahoney discusses preferential treatment of Patrick Kennedy in OUI accident.

2006

Fox News Live

Mahoney analyzes Duke rape case.

2006

Fox News Live

Mahoney discusses Duke rape case.

2006

Fox News Live

Mahoney analyzes Duke rape case.

2006

Fox News Live

Mahoney analyzes Duke rape case.

2006

Fox News Live

Mahoney analyzes Duke rape case.

2006

Fox News Live

Mahoney discusses Duke rape case.

2006

Fox News Live

Mahoney comments on Duke rape case.

2006

Fox News Live

Mahoney examines Secret Service involvement in Angelina Jolie and Brad Pitt stolen baby photographs

2006

Fox News Live

Mahoney comments on JonBenet Ramsey murder investigation.

2006

CNN/Nancy Grace

Mahoney defends Attorney Elliot Weinstein’s handling of Neil Entwistle’s murder case.

2004

Forensic Files

CourtTV’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 Live

CourtTV’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

CNN

CNN interviews Mahoney on case against Martha Stewart.

Publications

2018

James Publishing publication The Title IX Sexual Harassment Handbook

2008

Relentless Criminal Cross-Examination Relentless Criminal Cross-Examination

1990

New England Law Review United States vs. Stanley, Has the Feres Doctrine Become a Grant of Absolute Immunity?

Languages

Spanish

Portuguese

Armenian

Activity

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Avvo Rating Levels
10.0 - 9.0 Superb8.9 - 8.0 Excellent7.9 - 7.0 Very Good6.9 - 6.0 Good5.9 - 5.0 Average4.9 - 4.0 Concern3.9 - 3.0 Caution2.9 - 2.0 Strong Caution1.9 - 1.0 Extreme Caution