Overall Rating
This is an aggregated review score of Avvo and Lawyers.com reviews.
This is an aggregated review score of Avvo and Lawyers.com reviews.
5.0 /5.0
22 Client Reviews
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Marc Craig Gann
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About Marc
Biography
Marc Gann is one of the most highly regarded lawyers on Long Island. An AV-rated attorney who served as a past president of the 6,000-member Nassau County Bar Association from 2010-2011, Gann is on the "short list" of preeminent Nassau County criminal defense practitioners, and has handled numerous high-profile cases throughout the NY metropolitan area.
Mr. Gann also serves on the Grievance Committee for the Tenth Judicial District (reviewing the legal competence and professional conduct of lawyers in the Tenth Judicial District). He is listed in the Bar Register of Preeminent Lawyers, and in 2014 was named to the list of New York Metro Super Lawyers.
An experienced trial lawyer, Mr. Gann defends all types of criminal cases - from minor traffic matters and drunk driving cases to the most serious major felonies - in the courts of Manhattan, Brooklyn, Queens, the Bronx, Staten Island, Nassau County and Suffolk County. He has handled serious felony charges in both the Southern and Eastern Federal Districts of New York and is particularly experienced in the defense of murder cases, and was certified to handle death penalty cases by the New York Capital Defender's Office. He has handled numerous homicide cases including a double murder in Nassau County, and has been lead counsel in the defense of a multi-defendant murder and kidnapping case that received national attention. He is also experienced in the defense of drug cases, including cases involving anabolic steroids and other performance enhancing drugs.
Mr. Gann has taken verdicts on major felony charges such as burglary, robbery, drug sale and commercial fraud. He has examined and cross-examined all types of witnesses from civilian and police witnesses to experts in areas such as ballistics, fingerprints, serology and forensic pathology. He also has expertise in the defense of Driving While Intoxicated cases, having defended many hundreds of these cases. Having prosecuted drunk driving cases exclusively for a portion of his tenure as an assistant district attorney, trying numerous cases to verdict, he has a substantial practical advantage in now defending these cases.
Prior to his role as President of the Nassau County Bar Association, Mr. Gann also previously served as an elected Director of the NCBA. He is Past Chair of the Criminal Courts Law and Procedure Committee of the Bar, where he planned and chaired continuing legal education programs and seminars for criminal lawyers throughout the county. He was honored as the recipient of the Association's 2001 Directors' Award for his outstanding contributions the legal community.
He has frequently lectured to the local and State Bar Associations and the National Institute of Trial Advocacy. In recognition of his superlative trial skills, he was asked to serve as Team Leader for the 2002 National Institute of Trial Advocacy program at Hofstra University Law School. Mr. Gann continues to serve as Adjunct Faculty at Hofstra Law.
He has been interviewed by the media on many occasions regarding issues of criminal law, and he often appears on local television. He is a past president of the Former Assistant District Attorneys Association of Nassau County and is a member of the American Bar Association and other legal and professional associations. He is also highly active in community associations and volunteer programs, including serving for many years in a Bar association student mentor program at a local middle school.
Following his tenure as a prosecutor in Nassau County, Mr. Gann spent several years in Baltimore handling both criminal and civil matters in State and Federal court before returning to New York to form Collins, McDonald and Gann, P.C.
Former Nassau County Prosecutor and Past President of the Nassau County Bar Association on your side
Practice Areas
19
Practice Areas
Other
10%
Computer Fraud
5%
Criminal Defense
5%
42 years
DUI and DWI
5%
42 years
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
Awards
2015
2015
Licenses
Licensed in Maryland for 40 years
State: Maryland
Acquired: 1985
No misconduct found
Licensed in New York for 40 years
State: New York
Acquired: 1985
No misconduct found
Location
Marc Craig Gann's Reviews
Showing 1 - 5 of 16 client reviews from Avvo
Posted by anonymous | October 9, 2025 | Hired Attorney
This review is from a person who hired this attorney.
Great Lawyer
I worked with Marc and am very impressed and happy with results. He is very knowledgeable and personable. He guided me through the whole process, was easy to reach, and very responsive. Marc took the time to answer all my questions and explain everything to me. The rest of the team were great too. Hi...
Posted by Philip | September 12, 2025 | Hired Attorney
This review is from a person who hired this attorney.
Legal Expertise in all Areas of Law. Marc Gann is truly a knowledgeable, caring, compassionate, professional.
I am so thankful that I retained the services of Marc Gann to handle my case. I had interviewed several lawyers to represent me and Marc Gann was by far the most personable and knowledgeable. As I worked with him I was always impressed by the depth of his knowledge and that he genuinely cared about ...
Posted by Ryan | July 11, 2022 | Hired Attorney
This review is from a person who hired this attorney.
Marc Gann did amazing job
I was pulled over for a DWI and was nervous so I contacted Marc Gann and he made me feel very comfortable with the terrible situation I was in. After many court dates he got my charges dismissed. I couldn’t be happier and would highly recommend anyone who is in that situation to use him.
Posted by anonymous | November 3, 2020 | Hired Attorney
This review is from a person who hired this attorney.
DWI case
Did everything and more. Always available no matter what day of the week. Very clear about what is happening and what approach he is taking. Stays calm and assures he will get the job done and he does.
Posted by anonymous | October 28, 2020 | Hired Attorney
This review is from a person who hired this attorney.
The Calm in Your Storm
I was overcharged with 8 felonies in a case that was beyond ridiculous. I'd never been in trouble in my life and was terrified. Marc Gann was the calm in my storm. He always made himself available to me at all times. My case was dismissed. I cannot begin to tell you how grateful I am to Marc. If you ...
Marc Craig Gann's Lawyer Endorsements
"I have had the pleasure of working with Marc as opposing counsel on numerous criminal matters in Nassau County during my tenure as a Prosecutor. Now that I'm in private practice I consider him a colleague. In addition to his tremendous knowledge and experience with criminal matters, Marc is always courteous and professional. He is indeed one of the most well respected criminal defense attorneys on Long Island and as such I highly recommend Marc for any criminal defense case."
"I have had the pleasure of working with Marc on several criminal matters in Nassau County. Marc is one of the most well respected and knowledgeable criminal defense attorneys on Long Island. I highly recommend Marc for any criminal defense case."
"When it comes to criminal defense, Marc Gann is second to none. I have known Marc for over seven years, and his demonstrated trial skills and reputation in the legal community allow him to consistently deliver results for his clients. I endorse highly endorse Marc for any criminal defense issue."
"Mr. Gann is renowned in the legal field. He has excellent litigation skills and is branded as a top attorney."
"There simply is not a better trial attorney. I endorse this lawyer."
"I endorse this lawyer."
"I endorse this lawyer. I've known Marc for over a decade and he is an honest and very competent criminal defense attorney and he has a great firm. I heartily endorse him."
"I endorse this lawyer. Marc is one of the most respected members of the criminal defense bar in Nassau County and beyond. Judge's listen to him, prosecutors fear him and defendant's appreciate him for all that he can and will do for them when they need him the most. If Marc is your advocate, he gives you a great chance for the best result possible."
"I endorse this lawyer, who is a former prosecutor and bar leader."
"I have known Marc for a number of years and can say he is a true leader among the Long Island attorney's community. Through his tireless work in the courts he has established himself as one of the finest defense attorneys in Long Island. It is a privilege to endorse him."
"Marc is an excellent lawyer. He is always the best prepared attorney in the courthouse. Marc is dilligent and very hard working. He is a very fine strategist and exeptionally knowledgable. I highly endorse his work."
Philip Nash
Criminal defense lawyer
Sherry Wallach
Criminal defense lawyer
Richard Collins
Criminal defense lawyer
Gerard McCloskey
Criminal defense lawyer
David Barry
Criminal defense lawyer
Michael Bassett
Criminal defense lawyer
Experience
Honors
2025
Super Lawyer, Super Lawyers
2024
Super Lawyer, Super Lawyers
2023
Super Lawyer, Super Lawyers
2022
Super Lawyer, Super Lawyers
2021
Super Lawyer, Super Lawyers
2020
Super Lawyer, Super Lawyers
2019
Super Lawyer, Super Lawyers
2018
Super Lawyer, Super Lawyers
2017
Super Lawyer, Super Lawyers
2016
Super Lawyer, Super Lawyers
2015
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell
2015
Super Lawyer, Super Lawyers
2014
Super Lawyer, Super Lawyers
2001
Directors' Award, Nassau County Bar Association
N/A
Client Champion Award, Martindale-Hubbell
N/A
AV Preeminent Rated, Martindale-Hubbell
Work Experience
1990 - Present
Partner, Collins, McDonald & Gann, P.C.
1900 - Present
Partner, COLLINS GANN McCLOSKEY & BARRY PLLC
Associations
2009 - Present
Nassau County Bar AssociationPresident-Elect
Education
1984
Hofstra University School of Law
JD - Juris Doctor
1981
Franklin and Marshall College
BA
Languages
English
Activity
Legal Answers
Top Contributor
Marc earned significant contribution points in 2015.
Legal Answers
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