Our goal is to be your advocate and place your needs first. Our expertise includes civil and criminal litigation and defense. We provide sophisticated representation to individuals and businesses at every stage of a case - we focus on solutions, that way you can focus on your well-being.We are trial lawyers, and will aggressively protect your rights and freedom. We fight for our client's rights, and our goal is to get each and every client the best possible result. We believe that while our knowledge and experience set us apart from the rest, what matters most is our personal commitment to you. We care about you, and will be your champion. Contact us now for a free consultation. We are available 24/7/365.

what we do

Meet Your Attorney

Mark S. “Marcus” Barnett practiced law for twenty years, in Miami and Jacksonville.  Previously, he was an Assistant Attorney General, focusing on criminal and civil prosecutions, economic crimes, consumer protection and environmental crimes.

He then was in private practice in South Beach and Miami, where he handled criminal defense, federal practice, and general civil litigation, before moving to Jacksonville.

His practice areas include criminal defense and appeals, including complex federal prosecutions, white collar crimes, professional licensure issues, drug cases, sex and pornography offenses, as well as DUI’s and misdemeanors.   He also handles a variety of civil litigation matters, for individuals and businesses.

He has special expertise in crimes involving drug and alcohol addiction.


● Columbia College, Columbia University (B.A. in Political Science, 1983)

● University of Florida, College of Law (J.D. 1987)


● University of Florida Law Review

● Legal Negotiations Society

● Florida Association of Criminal Defense Attorneys

Federal Bar

● Middle District of Florida

● Northern District of Florida

● U.S. Eleventh Circuit Court of Appeals

Selected Practice History

● Assistant Attorney General, South Florida Bureau Chief, Consumer and Environmental Law Sections, Office of the Attorney General, State of Florida 1988-1993

● Mark S Barnett, P.A., Miami

● Fallgatter & Catlin, P.A., 2007-2017

Criminal Practice Areas

Civil Practice Areas

Disc Golf

You may have noticed that among the photographs on our website, you will see pictures of me holding and throwing frisbees.  Technically, these are known as disc golf discs.  Disc golf is one of the fastest growing sports in the world, combining aerobic exercise with coordination, mental stamina, as well as community building and fellowship.  The Barnett Law Firm is a committed supporter of the sport, sponsoring tournaments all around the world, and individual players locally.

Attorney Marcus Barnett is an avid disc golfer, and believes in the values of honesty, integrity, and leaving the world a better place than we found it, embodied in the sport.  Through his personal and professional involvement at the local, national, and international levels, Mr. Barnett stays active, and is able to help many other people.

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Good man – very intelligent. I would recommend him to anyone that needs legal help. He has been very good to me!

 Margaret Bartlett
Margaret Bartlett

Worked his butt off for me and is just a stand up guy!

 Robert Keith
Robert Keith

Marcus is an excellent attorney. He is very knowledgeable about the judicial system and how to get things done fast!

Kealalani Baumann
Kealalani Baumann

Very knowledgeable, caring, and professional!!!!! Amazing attorney! Wouldn’t trust any other attorney with my legal needs!

Sarah Bolger
Sarah Bolger


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