Mark T. Lassiter: Attorney Profile

Dallas criminal lawyer Mark T. Lassiter, J.D., is a tough, criminal defense attorney whose knowledge and experience belie his age. A former prosecutor for the Dallas County District Attorney’s office, Mark Lassiter has experience handling a wide variety of criminal cases, including:

Mark Lassiter treats every case he takes with the same seriousness and dedication – from the smallest infractions to the most serious felonies. Lassiter knows what it takes to win a trial, and he has the dedication and the tenacity to fight for the results you want.

Experience and Dedication

Mark Lassiter has a wealth of experience and qualifications he can bring to your case, including:


Mark Lassiter graduated with honors from Texas A&M University, earning his degree in Business Management. From there, he attended the South Texas College of Law, where he was a key member in their successful Mock Trial program. It was here that Mark honed the skills necessary to become a successful trial attorney.

  • J.D., South Texas College of Law
  • B.A., Texas A&M University – Business Management

Founding Member

  • Barrett Bright Lassiter Linder Perez

Officer in the U.S. Military

Airborne Infantry

Mark Lassiter began his career in the military at the age of 18, as an Airborne Infantryman, where he served as part of the 143rd Long Range Surveillance Team (LRS). The team was designed to parachute in behind enemy lines and radio crucial intelligence back to the front lines, without being detected by the enemy. This required countless hours of training and an acute attention to detail, as any small mistake could lead to the destruction of the entire team. As a member of the 143rd LRS, Mark learned how to work under strict timetables in a constantly stress-filled environment, a quality he can bring to your criminal defense case.


After serving with the 143rd Long Range Surveillance Team, Mark became a gunner in an M1 Abrams A2 tank. While training for service as a tank gunner, Mark was the honor graduate of his class.

Officer Candidate School / Judge Advocate General

While serving as a tank gunner, Mark was selected to attend Officer Candidate School, a program designed to teach enlisted soldiers the leadership and tactical skills they needed to become officers. He again rose to the challenge, receiving honors for his excellent performance.

Top Rated Lawyer - Rating 10.0
Top 10 Dallas (BEST D)
Dallas Bar Association
Texas Criminal Lawyers Association
Dallas Criminal Defense Lawyers Association
Super-Lawyers Logo
American Association for Justice
The National Trial Lawyers - Top 100 Trial Lawyers


“He handled an unjust ticket for me and was very thorough and on time with notices, etc. His communication was short and to the point without false fluffy words or promises.”


When my son received a DWI, I wanted to get him THE BEST lawyer I could find. I researched for two days, and then I found Mark Lassiter. I looked no further. As soon as I read about him, I knew that I found THE BEST. From the moment I met him, I had COMPLETE confidence in him. At the end of my son's trial, Mr. Lassiter came through with a defense case so impressive that the case was dismissed before the prosecutors finished their argument. I will always be grateful to him.


Mark is a very intelligent professional defense Attorney on my DWI offense that Mark convinced the jury that i wasn't guilty i highy recommend Mark to my family and friends once again thanks Mark


I had my first DWI charge and I was unclear of next steps. I was getting propositioned left and right by less ethical lawyers and one even "claimed" my case and I missed my court date. However, Mark Lassiter and his amazing paralegal took care of everything. They were very prompt and clear with their communication on every step of the process. Also if anything came up I got a call right away and they let me know what I needed to do next. Honestly made this stressful situation manageable. I already recommend them to anyone who is going through the same situation as me. That said he does come at a premium cost but is worth every penny, and his team is willing to work with you on payment plans.


I recently was referred to contact Mark Lassiter by a colleague and called him for a consultation related to a recent arrest for public intoxication in Dallas. He was terrific; I had never been arrested before and was unsure of what the appropriate next steps would be. He was detailed in his step-by-step approach and provided me sound legal advice on how he would handle this case.I elected to hire him as my attorney and it was the best decision. He handled my case and was able to get the charges dismissed. As a professional it was imperative to be able to get this charge removed from my record.If you are in need of a criminal defense attorney, I would highly recommend Mark's services.


I am a very satisfied and a relived client. After meeting with various lawyers Mark was the one who won me over. Walking into his office you will be impressed of all his credentials. He is professional and aggressive which is what everyone looks for in a attorney. Every other lawyer I interviewed mentioned to "plea deal", I knew that meant settling. A DWI on my record was the LAST thing I wanted. I was very hopeless and scared (considering it was my first offense) but Mark always reassured me that I had a very good case. Ultimately, Mark did a phenomenal job in the court room (he had the prosecutors speechless), which resulted in a dismissal. I recommend this man to everyone I know. Thank you Mark, I owe you my life.