Government Investigations & Prosecution

5.0 Google Rated

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From being served with a Grand Jury subpoena as a witness, to being told you are the subject of an investigation, to being indicted with a crime, a person’s encounter with federal agents, prosecutors, and the criminal justice system is often a traumatic experience.

Without zealous and effective representation, the criminal justice system does not work. We have spent substantial portions of our careers as prosecutors and criminal defense attorneys and know what works (and what doesn’t) for both. We have tried dozens of criminal jury trials and have argued numerous criminal appeals.

We have represented individuals and organizations under investigation and charged with crimes and in ancillary criminal proceedings regarding extradition and collateral challenges of convictions.

Frank Maderal spent six years as an Assistant United States Attorney in the Southern District of Florida taking on high-profile cases, including as lead prosecutor in some of the largest money-laundering prosecutions in the history of Miami.

Frank led complex local and international investigations and prosecutions against individuals and corporations for corruption, Ponzi schemes, fraud, money laundering, foreign bribery, computer fraud, and Bank Secrecy Act violations. Frank also lectured federal law enforcement agencies on cyber-crime and complex money laundering investigations.

During his time at the U.S. Attorney’s Office, John Byrne charged over 60 cases, including numerous fraud cases.

Frank and John have defended individuals and organizations under investigation and indictment and subject to grand jury subpoenas.

In The News

Our team of attorneys has been featured in numerous national and international publications for victories in criminal and civil law:

Andrew Elfmont

I have known these lawyers for years and watched their careers as federal prosecutors. There is no firm I would recommend more or rather represent me.

January 3, 2023
Matt Giordano

John is an excellent lawyer and person. He has an excellent track record going back to his days as a federal lawyer. I fully recommend working with him and his team, you’ll be glad you did.

January 3, 2023
Jonathan Armstrong

John Byrne is a highly talented lawyer, very hardworking and experienced, and takes advocacy and his ethical duties seriously

January 5, 2023
Moss Levenson

I have not encountered better legal thinkers and strategists. John has worked many large cases, going all the way back to his time as a federal prosecutor. Excellent in trial.

January 17, 2023

Our Cases

Over 1 Billion Dollars Recovered

$1.12 Billion Building Collapse

More than 1 Billion Dollars awarded to victims and families of victims of the 2021 Surfside Condominiums Building Collapse

$66 Million commercial arbitration

$66 million awarded to our client in a confidential commercial arbitration agreement

$26 Million Ponzi Scheme Class Action

$26 million preliminary class settlement against bank relating to Ponzi scheme

$4 Million Auto Accident

$4 million, record, recovery against Miami-Dade County for infant injured in accident with police cruiser

$3.9 Million Wrongful Death

$3.9 million confidential wrongful death recovery

$2.5 Million Stolen Funds Tracked

$2.5 million in stolen funds tracked to and frozen in Germany on behalf of corporate client

Why Hire Us?

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Recognized leaders in complex litigation who have secured multiple multi-million dollar settlements, and court-appointed leadership positions.
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High-Quality Representation

Your case will be handled by an experienced team of seasoned trial lawyers who have experience prosecuting and defending federal criminal cases as well as litigating national mass-tort matters.
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Constant Communication

Our team will keep you updated on the status of your legal situation throughout the duration of your case. You will always be kept in the loop through every development in your case so that you can make informed decisions.
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Above & Beyond

Our legal team will go above and beyond for your case, ensuring we do everything legally allowed to achieve a favorable result in your case.

Get In Touch

(305) 520-5690

Get in touch with Maderal Byrne & Furst PLLC by calling or using the form below:

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Maderal Byrne and furst updated Logo white

Get In Touch

(305) 520-5690

Get in touch with Maderal Byrne & Furst PLLC by calling or using the form below:

"*" indicates required fields

This field is for validation purposes and should be left unchanged.