Plaisance Law, LLC, comprised of father and son team Mark and Marcus Plaisance, is a practice focused primarily on state and federal appeals and supervisory writs. Together we have over 30 years of legal experience. Our mission is to provide appellate services and to ease the transition of a case beyond the trial court.

Mark has more than 500 docketed appeals and writ applications in criminal law, personal injury law, family law, education law, property rights law, criminal and civil procedure, and myriad other legal areas. He has written, argued, and won appeals or supervisory writ applications in all five Louisiana appellate courts, the Louisiana Supreme Court, and the United States Fifth Circuit. Additionally, Mark successfully argued before the United States Supreme Court in the 2016 landmark criminal case of Montgomery v. Louisiana.

Marcus has handled several appeals in personal injury law, Louisiana Constitutional law, and civil rights law. He has also tried several bench and jury trials to verdict. His experience as an appellate court intern, district court law clerk, and active trial attorney provide a unique insight into the pre-appeal process.

For our clients, we are here to represent you after your trial. Whether you require an appeal or a complicated emergency writ, we are prepared to consult and handle your case. We have represented clients before the five Louisiana Appellate Courts, the Louisiana Supreme Court, the United States Fifth Circuit Court of Appeals, and the United States Supreme Court.

We are available at your convenience to discuss what we can do to save you time and allow you to focus on your practice while we handle the appellate needs of your clients and the research and writing aspects of your practice. We look forward to working with you.

When you have been injured because of someone else’s fault, you will have many questions. Should I go to the emergency room? Should I go to my primary doctor? How will my car get repaired? What will I do if I am unable to work? These and many other questions are normal. We are here to discuss your questions and provide advice on your injury case.

Mark and Marcus have over 30 years of combined legal experience and have handled many injury cases. Whether you are out of work for many months and require surgery or your injury requires one trip to the emergency room, Mark and Marcus can provide the advice you need. We are here to guide you through the process whether your case can be settled or whether suit will need to be filed.



We have experience representing clients from day one of their case through the final appeal or writ. Mark and Marcus have represented well over a thousand clients in various areas of law: family law, criminal law, personal injury law, education law, civil rights law, and many more. We know what it takes to handle your case and are ready to discuss this matter with you.

If you are a trial attorney looking to take an appeal or writ for your client, we are ready to serve as co-counsel with you or become appellate counsel. We are also available to consult during civil and criminal trials to preserve issues for appeal and create a thorough, reliable record. Additionally, we provide research and consultation on motions, exceptions, and mediation position papers.