138 Mineola Boulevard, Mineola, New York 11501
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Premier Criminal Defense Lawyers on Long Island

Collins Gann McCloskey & Barry, serving clients across Nassau County

The Long Island attorneys at Collins Gann McCloskey & Barry PLLC possess a combined six decades of experience defending citizens of Nassau County and the surrounding areas against criminal charges. We provide dedicated, focused legal defenses regardless of whether our client faces a traffic ticket or a serious felony. Founded in 1990 as Collins, McDonald & Gann, our firm has grown tremendously over the past decades. In 2015, one our three founding partners, Bob McDonald, was elected to the New York State Supreme Court bench. Gerard McCloskey and Dave Barry, two of Nassau County’s top criminal defense attorneys, are now partners in our established Long Island criminal defense practice group.

An unrivaled reputation among Long Island criminal defense lawyers

If you or a loved one faces criminal charges on Long Island, you need a legal representative who understands and knows how to deal with the Nassau County criminal justice system from the inside out.

At Collins Gann McCloskey & Barry, every one of our partners is a former Assistant District Attorney of Nassau County. As former prosecutors, we know the system from both sides. We possess extensive experience litigating in both state and federal Long Island criminal courts, and have resolved countless cases through settlement and verdict. With equal conviction, we represent individuals and businesses against charges ranging from traffic offenses and drunk driving to major white collar conspiracies and economic crimes, drug crimes, violent felonies and homicide.

Our reputation among peers is unsurpassed. Founding Partners Rick Collins, Past President of the Nassau County Criminal Courts Bar Association, and Marc Gann, Past President of the Nassau County Bar Association, have each been awarded the AV® Preeminent™ Peer Review Rating from the Martindale-Hubbell® directory of lawyers, their highest honor, which reflects our legal abilities and ethical standards. We are also listed in the Bar Register of Preeminent Lawyers, and have received numerous honors and awards throughout our 25 year history as a criminal defense law firm. New partners Gerard McCloskey and Dave Barry each brings extensive experience and recognition as top criminal defense lawyers to the firm, with Gerard McCloskey nationally ranked by the NAFDD (National Advocacy for DUI Defense) as a Superior DWI Attorney. Rick Collins currently serves as Secretary of the Nassau County Bar Association, which has a membership of nearly 6,000 and is the largest suburban bar association in the country.

Long Island attorneys ready to help

It does not matter whether you face a simple traffic ticket, a misdemeanor or a more complex set of criminal charges. Mounting an effective criminal defense should be the most important goal for you and your attorneys. The Long Island attorneys at Collins Gann McCloskey & Barry PLLC can help you develop and execute the strongest possible legal defense in such areas of legal practice as:

An experienced Long Island attorney in your corner

Facing a criminal charge may be the most serious and stressful event of your life. Do not make the mistake of representing yourself against such charges, or hiring a lawyer inexperienced in New York criminal matters. The Long Island criminal defense lawyers at Collins Gann McCloskey & Barry PLLC have the experience you need to mount your strongest possible legal defense and answer your most pressing questions. Reach us online or at 516.294.0300 today. We are available 24 hours a day, 7 days a week to discuss your matters.


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