Dallas Drunk Driving Attorney – Firm Overview

Don’t let your Dallas, Texas DWI be handled by just any criminal defense lawyer. At the Law Office of Mark T. Lassiter we devote a majority of our practice to defending Dallas Drunk Driving charges. The firm is ready to defend your DWI, DUI, BWI, Intoxication Assault and Intoxication Manslaughter charge against both adults and minors. Mark T. Lassiter is licensed to practice criminal law in all Texas Courts as well as the Northern District of Texas Federal court.

Mark T. Lassiter focuses on representing citizens accused of Driving While Intoxicated (DWI), Driving Under the Influence (DUI), Intoxication Assault, Intoxication Manslaughter and all other alcohol related drunk driving offenses in the State of Texas. Call the Law Office of Mark T. Lassiter for a free DWI/DUI case evaluation. Mark will answer all of your questions, will give you the information you need to proceed with your Texas DWI.

Find an Aggressive, Experienced Dallas DWI Lawyer

When choosing a Dallas DWI lawyer, your attorney’s experience is extremely important!! Mark T. Lassiter is an experienced criminal defense lawyer and employs a staff to help you through the entire DWI process and all aspects of your DWI case. Mark T. Lassiter’s goal and priority is to permanently keep a conviction for Texas DWI off of your record.

The Law Office of Mark T. Lassiter, is a Dallas, Texas criminal defense law firm concentrating in drunk driving cases including Driving While Intoxicated (DWI), Driving Under the Influence (DUI), Boating While Intoxicated (BWI) Intoxicated Assault and Intoxication Manslaughter and all other alcohol related offenses in Dallas, Tarrant, Collin, and Denton counties.

Having an experienced Dallas DWI Lawyer can mean the difference between winning and losing your drunk driving case. A DWI charge or conviction in Dallas, Texas can have serious and life-changing consequences, and if your DWI case is not handled properly, there may be serious consequences. This is why it is of utmost importance to hire a Dallas Texas criminal defense lawyer who focuses on handling DWI’s and other alcohol related offenses. Call today for a free DWI/DUI case evaluation.

What you can expect if you hire Mark T. Lassiter to represent you

At the Law Office of Mark T. Lassiter we guarantee to investigate every potential angle to obtain the ultimate goal of keeping a charge or conviction of DWI off your record. We will make sure:

  • the officer had a valid reason for initially stopping your vehicle
  • the officer had reasonable suspicion to investigate for DWI
  • the officer conducted the Standardized Field Sobriety Tests properly
  • the officer had probable cause to arrest you
  • the officer was properly trained before investigating your case
  • any breath or blood test was given properly
  • the instrument used to take your specimen was in proper functioning order

Mark T. Lassiter has experience in knowing when and how to challenge each and every action and test a police officer offers. He will aggressively fight to ensure that your rights are protected.

If you have been accused or charged with a DWI call Dallas DWI Lawyer Mark T. Lassiter to find out the best course of action for you.

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You know when you seek medical care; you put your life in the hands of doctors. You want someone to fight for you as they would fight for themselves. The same occurs with an attorney and Mark is definitely someone that will fight for you.

Dr. Patrick W.

I was arrested in March 2010 for suspicion of DWI, and had blown a 0.18. I retained Mark 3 days later and through his hard work and diligence my case was dismissed without my ever having to appear in front of a judge. His knowledge of criminal law is incredible, and he is very kind, and was incredibly respectful and encouraging throughout this entire harrowing process. Previous to this arrest I had never had so much as a speeding ticket and I came into this extremely scared and terrified of the long term implications of a DWI conviction in Texas, as Texas is not a state that allows adjudication and I am an RN who made one incredibly bad decision, but a conviction on DWI could cost me my license to practice. I chose Mark on the recommendation of several people whom I trust, and I am so glad I did! His staff is very courteous and helpful, and his track record is impeccable! I honestly didn’t dare hope that I might be so fortunate as to get my case dismissed, but Mark came through for me with flying colors! Thanks to Marks knowledge and hard work I will be eligible to have this arrest expunged from my record in two years, and can relax knowing that my license to practice is safe. Mark was also always willing to hear me out and never tried to pressure me into anything I was uncomfortable doing, he returned my calls and emails within hours and did everything he could to reassure me that while there was a great deal of gravity to the situation I had landed myself in, that he would champion my cause. I made a terrible, terrible choice, and I am so grateful and fortunate the no one was hurt. I owe so much to Mark, and I will never be able to thank him enough for his hard work on my behalf.


Obviously you have accessed Mark Lassiter’s website, please bear with me while I inform you about your good fortune. Unfortunately I found myself retained by the Garland Police some time ago on a DWI charge. I have never heard any of my friends/co-harts discuss this subject. Due to the personal humiliation of the circumstances, this is not something that I would approach them on either. So I had to rely on Google to find attorneys that dealt with this type of thing for Garland. Finding multiple hits I began the review of websites until I accessed M. Lassiter’s. I was extremely impressed. I made contact with him with the normal trepidation of retaining an unknown individual for such a sensitive personal matter. Little did I know at the time of my good luck. During the course of my case, a couple of attributes I learned about M. Lassiter are as follows: · He was very capable, and never lost focus of my case and best interests · He was easy to talk to and actually listened and responded to the pros and cons of my standpoints · He is a very personable and energetic person Ultimately I am sure you will find retention of M. Lassiter a most beneficial partnership in the resolution of your case.

Best Regards, Rita L.

In need of legal representation, we researched qualified attorneys in the Dallas Area. At our initial consultation with Mark Lassiter, he discussed his fees, plan of action, and potential outcomes of the case.  We found him to be not just competent, but detail-oriented and thorough.  His knowledge of the law and court proceedings was comforting. Mark Lassiter kept us informed of progress, and was able to resolve the case as quickly as possible.  Through his diligence, we got the best possible outcome. We would highly recommend his services to anyone who asks.

Bob and Jill

I found information regarding Mark by searching the web while in Illinois and my son was needing representation in Tarrant County Texas. Mark returned every single call I made, and every email I sent. I believe that Mark is a fair and honest and will try to do what is best for who he represents.


I had never been in trouble with the law. I had no idea who to call or what to do and I was certain this was going to hang over me the rest of my life. Mark took care of everything. From the first conversation he put my mind at ease and assured me everything was going to be OK…and he was right. He literally made it GO AWAY! Thank goodness. Now, that one moment of my life will not ever define who or what I am.


I’ve finally found a lawyer I can count on.

Cody B.

I switched from my original lawyer to you because you made sure I understood the entire process.

Amanda H.

My family and I will always be indebted to you.

Lisa L.

You were able to help me win my case when I didn’t think anybody could.

Roger C.

I would never use or recommend anyone else for anybody else for a criminal manner.

Cory M.

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