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  • The BEST attorney in Harris County and probably one of the best in the nation."
  • If you want a GREAT lawyer, Mark Thiessen is your man."
  • The Best Lawyer in the Industry"
Read Our Testimonials


Not Guilty Verdicts
  • .171 Breath Test - Not Guilty
  • 0.119 Blood Test - Not Guilty
  • 0.158 Blood Test - Not Guilty
See Our Results


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) 864-9000 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
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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!

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