Updates to the U.S. Sentencing Guidelines Just Became Effective: What You Need to Know
The U.S. Sentencing Commission implemented key changes to the Sentencing Guidelines that took effect on November 1, 2024. These...
At GreenClark Law Firm, we do not just manage cases; we fight battles. Whether you are facing a federal indictment, a DEA investigation, or have suffered a catastrophic injury, you need more than a standard lawyer. You need a team that understands how the other side thinks.
Led by Stephen Green, a former Federal Public Defender, and Jeff Clark, a former FBI Special Agent and CPA, we bring “FBI-caliber” investigative techniques and aggressive federal trial experience to every client we represent.
Serving Dallas, Fort Worth, Southlake, and the Northern District of Texas.
Every client that we represent will know that we battled for them every step of the way. Winning requires a unique combination of boldness, intellect, and a relentless work ethic. Our mission is to put justice back into the legal system. Contact GreenClark Law Firm, in Dallas, TX today to discuss your case.




My Boyfriend was looking at a lengthy amount of time in the federal prison and Gabby Markolovic helped him cut that time down substantially we are more than grateful for everything she did for us. Thank you so much Gabby 🫶🏾.
Great lawyers that are committed to helping their clients. They go above and beyond!
I wholeheartedly recommend the work of Stephen Green and Jeff Clark. They combine their strengths and complementary experience to form an exceptional team. Throughout the entire process, they were professional, dedicated, and reassuring. My 26‑year‑old son’s situation was unique and quite complex. After almost three years, he was finally able to receive a fair and reduced sentence. I will genuinely miss our almost daily conversations — you became a bit like family to us through your unwavering efforts. I remain available to speak directly with your future clients if needed. Wishing you continued success in the many cases ahead. Anne
I was in charge of finding the best defense lawyers in Texas to represent someone who was facing a complicated fraud case with a very large loss amount. Stephen was recommended to us by a US District Attorney. From the first call to the last email, Stephen and Jeff did an amazing job. Jeff's past FBI experience and Financial experience was a key element to the success of the case. They managed to get a very favourable outcome and reduce the guideline sentence by 75%+. Client got time served. These lawyers are respected in their district. They are responsive. They have a great team (thank you Gaby). You are lucky if you get to be represented by their firm.
Mr Green is a great lawyer when he say he doing something he do it. Thank you for keeping me with my family.
I had the privilege of working with Stephen Green, and I can honestly say he is one of the best lawyers I’ve ever met. From the very first consultation, he was professional, knowledgeable, and genuinely compassionate. Stephen took the time to understand every detail, explained all of my options clearly, and guided me through every step. What really stood out was his dedication and responsiveness. Any time I had a question or concern, Stephen was quick to respond and always made me feel supported. Thank you Stephen!
She's a great lawyer an I would definitely hire her she's great.
I am a physician who has worked hard to provide very high level care to my patients for more than 30 years. Somehow, in the course of providing this high level care, I was wrongfully accused of healthcare fraud. I hired Jeff Clark to handle my case and he professionally addressed the issues of concern leading to my dismissal from the case. Jeff handled the entire case very professionally, and always kept me informed about how things were going. If any other physician or other professional ever gets in a similar legal dispute, I highly recommend the Green Clark Law Firm!
Gabby has been so helpful and very supportive in a sensitive situation highly recommend!!!
I want to thank Gabi for helping me in my rough situation she helped me in so many ways that I cannot express how grateful I truly am. Throughout the times we met & spoke she was very supportive, passionate & dedicated with her job on helping me receive the best outcome. I must say again there are no amount of words I can say to express how grateful I am to have her on my side. HIGHLY RECOMMEND HER !!!







Sophisticated cases require a sophisticated team. In order to win, your team must create leverage and pressure on your opponent. We do that by combining deep legal acumen, FBI-caliber investigative techniques, and financial industry expertise.
The standards required to accuse someone of a federal crime or regulatory violation are shockingly low. For the accused, this creates a sense of stress and doom punctuated by fear, panic, and uncertainty. We firmly stand between the accused and the federal government. In doing so, we instill courage, calm, and certitude within the accused. We despise wrongful convictions, and we believe in the power of jurors to prevent them. When the government cannot eliminate every single reasonable doubt in its accusation, we will unleash that juror power by forcing the government into the crucible of trial.
To put justice back into the legal system.
To win every client's case.
Deep. Sharp. Lawyering.
Serving our community and helping those in need.
To put justice back into the legal system.
To win every client's case.
Deep. Sharp. Lawyering.
Serving our community and helping those in need.
Be represented by a Law Firm that will seek to get you justice with fidelity, bravery, and integrity with more than 400 federal cases.
As the Proverb goes: iron sharpens iron, one person sharpens another. So do Stephen Green and Jeff Clark. They have built GreenClark Law Firm on the foundation that fighting for those in need of justice is not just a job, it is a privileged calling. And it’s personal for each of them.
For Mr. Green, fighting for the accused became a calling when the government went after his family. When he was 19 years old, his cousin was prosecuted for a serious federal drug offense. The only person standing between her and a decades-long prison sentence was her defense attorney—an outstanding advocate that fought tirelessly for her freedom. His advocacy forever changed her life, and after that sentencing hearing, Mr. Green resolved to do the same: he made it his life calling to stand next to the accused, ensuring that clients’ rights are protected zealously and that their stories are told. Mr. Green has served as lead counsel in more than 400 federal criminal cases—he is intolerant of injustice, and he knows what it takes to get the best possible results.
Mr. Clark is likewise intolerant of injustice. After becoming a Texas CPA, serving as a CFO of a publicly traded company, and working as a hedge fund analyst, Mr. Clark was appointed as a Special Agent for the Federal Bureau of Investigation. The first thing he did as an FBI Agent was swear an oath to uphold and defend the Constitution of the United States. He still upholds that oath—including to the Seventh Amendment’s promise that those harmed by the injustice of evil, reckless, or careless wrongdoers can present their civil case to a jury to obtain justice for the harm they’ve suffered. With respect to defending the accused, Mr. Clark sat across from defense attorneys frequently, and the truth is that too many of those attorneys were lazy and unconcerned with their clients’ freedom. Observing that indifference firsthand motivated Mr. Clark to go to law school and become the advocate that provides his clients with the excellent representation that justice demands.
We do our own investigative work and we drive our cases towards success by developing facts that help our clients win. Further, with client consent, we routinely affiliate with trusted, sharp and like-minded attorneys and experts to create a formidable legal force multiplier. Everything we do is underscored by our commitment to respect, accountability, and civility. And although we cannot promise any particular legal outcome, we can make this promise–to give our best towards forging justice for our clients.
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We welcome the opportunity to speak with you about your legal problems. We are confident that after doing so, you will see what sets us apart.
8350 N Central Expy Suite 1900 Dallas, TX 75206
817-953-8699
817-668-0659
550 Reserve Street Suite 190 Southlake, TX 76092
817-953-8567
817-668-0659
Unfortunately, there are bad companies, bad people, and bad public employees in our society. Whether with evil intent, just plain carelessness, or something in between, these wrongdoers harm others. Those harmed usually suffer from pain, anger, grief, and sorrow. Money can never completely compensate for the injustice suffered. But we try to force the wrongdoers to pay money for every bit of harm they cause others. And for the truly evil or callously indifferent? We also seek to punish those kinds of wrongdoers to the maximum extent allowed by civil law.
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