Open Accessibility Menu
  • "The BEST Attorney in Harris County!!"
  • "If You Want a GREAT Lawyer, Mark Thiessen is Your Man"
  • "The Best Lawyer in the Industry"
  • "Excellent Attorney to Have Represent You"
  • "Fantastic Lawyer!"
  • "Best DWI Lawyer out there!"
  • "Mark Thiessen Has The “IT” Factor"
  • "Amazing, Reliable and Superb Attorney! The Great Mark Deserves 100% Marks"
  • "You Cannot Compare Anybody with Mr.Mark!"
  • "Mark Eres Mi Hombre Que Luchó Por Mi Libertad y Justicia!!!"
  • "When you really need somebody to defend you I recommend you go hire Mark Thiessen."
Read Our Testimonials

100+

Not Guilty Verdicts
  • .171 Breath Test - Not Guilty
  • 0.119 Blood Test - Not Guilty
  • 0.158 Blood Test - Not Guilty
  • 0.146 Breath Test - Not Guilty
  • 0.176 Breath Test - Not Guilty
  • 0.184 Blood Test - Not Guilty
  • 0.10 Breath Test - Not Guilty
  • 0.194 Blood Test - Not Guilty
  • 0.16 Breath Test - Not Guilty
  • 0.199 Blood Test - Not Guilty
  • 0.140 Breath Test - Not Guilty
  • 0.098 Blood Test - Not Guilty
  • 0.127 Breath Test - Not Guilty
  • Not Guilty - Not Guilty
  • 0.144 Breath Test - Not Guilty
  • 0.172 Breath Test - Not Guilty
  • .24 Breath Test - Not Guilty
  • Intoxicated Assault - Dismissed
  • .17 Breath Test - Dismissed
  • .22 Blood Test - Dismissed Mid Trial
  • .16 Breath Test - Dismissed
  • 0.161 Blood Test - Not Guilty
  • No Test, No Accident - Not Guilty
  • .16 Blood Test - Not Guilty
  • .21 Blood Test - Not Guilty
  • 0.226 Blood Test - Not Guilty
  • Intoxicated Manslaughter - Not Guilty
  • DWI - Not Guilty
  • DWI Breath Test .10 - Not Guilty
  • 0.138 Blood Test - Not Guilty
See Our Results

Resources

Helpful Information from Our Houston Trial Attorneys

If you are looking for more information and help in regard to any legal matter, we have created this resources portion of our website to provide links to reputable websites that can help. From general resources to law enforcement and government resources, these links can help you. Additionally, we welcome you to contact our Houston, Texas offices any time for a free case evaluation with one of our experienced trial lawyers. With your unique situation and needs in mind, we can counsel you on your rights and options to help you make informed decisions. Call (713) 999-3959 or contact us online today.

Our Resources

Meet Our Legal Team

As one of Houston’s most distinguished criminal defense firms, Thiessen Law Firm emphasizes quality over quantity. We will get to know your case better than anyone and will utilize every tool at our disposal to secure the results you need. We are dedicated to your needs – 24 hours a day, 7 days a week. As soon as you hire us, you will receive the direct contact information on everyone on your case.

Meet Our Team
Prev Next
Community Image

In the Community

Over the past years, Thiessen Law Firm has taken pride in giving back to the community and has donated to a number of non-profits and events, such as those featured below. If your non-profit or charity is interested in sponsorship from Thiessen Law Firm, contact us today!

Read More

Request Your Free Consultation

Fill out the form below or call (713) 999-3959 and we'll get back to you shortly.

  • Please enter your First Name.
  • Please enter your Last Name.
  • This isn't a valid phone number.
    Please enter your phone number.
    You entered an invalid number.
  • This isn't a valid email address.
    Please enter your email address.
  • Please make a selection.
  • Please enter a message.