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Mark Thiessen

DWI, Criminal & Civil Trial Attorney

Biography

Mark Thiessen was born and raised in Houston, Texas. Mr. Thiessen attended the Village School and St. Francis Episcopal Middle School before graduating from the Kinkaid School in 1996. While at the Kinkaid School, Mr. Thiessen won state in advanced acting and was captain of the tennis team. Mr. Thiessen then attended and graduated from Texas Christian University in 2000 with a Bachelor’s of Business Administration in Marketing. While at TCU, Mr. Thiessen was a member of Phi Delta Theta fraternity and on the dean’s list.

He then came back home to Houston and continued his education at South Texas College of Law (STCL) in Houston.  While attending STCL, Mr. Thiessen was active in mock trial, various law societies and intramural football. He also studied International Criminal Law at the University of Malta during the Summer of 2001. Additionally, Mr. Thiessen studied abroad at the BPP Law School in London, England and at the University of Hawaii. Studying in these unique legal environments required Mr. Thiessen to adapt to various social, cultural, ethnic and economic groups, which is evident in his personality today.

After graduating from law school, Mr. Thiessen practiced civil law for three years in cases ranging from admiralty and maritime issues at Bell, Ryniker & Letourneau to toxic tort and personal injury claims at Brown Sims, P.C. He still maintains many close connections in the civil world. In January 2006, though, he followed his true calling to the criminal court room and became a skilled trial lawyer.

Trichter & Murphy, P.C., hired Mr. Thiessen as an associate in January 2006, where he worked for over five years. There, he studied under one of the foremost legal authorities in Texas.

Although his practice includes all areas of criminal defense, Mr. Thiessen maintains an emphasis on DWI and drugs or controlled substances. The trial of a DWI case dictates that on any given date, a trial lawyer must be not only well-versed in Rules of Evidence, case law pertaining to DWIs and constitutional law, but also numerous areas of science such as anatomy, physiology, toxicology, chemistry, computer science, biology and physics. A DWI case is the most difficult legal case to try because of the quality of adverse political sentiments against alleged drunk drivers such as Mothers Against Drunk Driving (MADD), much of the offense being videotaped and field sobriety tests that have become scientifically standardized. Also, many DWIs become more difficult when they are coupled with accidents that require accident reconstruction knowledge; injuries that occurred in accidents that require a working knowledge of anatomy, physiology and medicine; and chemical testing that requires breath, blood and urine. Clearly, for the skilled DWI trial lawyer, the defense of a citizen accused of DWI is intensely complex and requires a great deal of legal and scientific preparation. DWI defendants are unique in the criminal justice system and no greater opportunity exists for an innocent person to be convicted than with a DWI charge.

Mr. Thiessen prides himself in being an aggressive trial lawyer. If the district attorney will not bargain or justice will not be served by allowing the client to plead guilty, Mr. Thiessen will aggressively, passionately and professionally represent you in trial. He has a strong reputation as a trial lawyer and works hard to maintain that status. Mr. Thiessen is also the youngest criminal Super Lawyer in Texas for 2013.

Fearlessness in the courtroom is a byproduct of Mr. Thiessen’s normal routine. Outside the courtroom, he is an avid competitor in Brazilian jiu jitsu and muay thai. He is a member of BRAZIL-021 School of Jiu Jitsu and has won medals at the Atama Open, Abu Dabai Combat Club, Fight to Win, IBJJF Houston International Open and the Grappler’s Quest Tournament. He is also a member of Team Hoger Muay Thai and is a 2010 Warrior Dash finisher. Mr. Thiessen is also 2012 Color Run finisher and two time 2013 Tough Mudder finisher.

If you have a case and want an attorney who does not back down, then you must call Mr. Thiessen at 713-864-9000.

Honors

Super Lawyers
Lawyer Scientist
Avvo Rating
AV Preeminent
TCDLA
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Media

September 28, 2017

Houston Attorney Mark Thiessen Wins Fifth Consecutive Super Lawyers Award and Makes Top 100 Lawyers in Houston

Criminal Defense Attorney Mark Thiessen is the only DWI Attorney to rank in Top 100 for prestigious Thomson Reuters Award

October 24, 2016

Attorney Mark Thiessen Receives 4th Consecutive Super Lawyers Honor

Houston lawyer recognized by peers for professional excellence

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Speaking Engagements

Houston, TX

TCDLA Top Gun DWI Seminar

Not Guilty v Cerberus: Beating Intox Manslaughter Cases

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San Antonio, Texas

TCDLA Rusty Duncan Seminar

Not Guilty v Cerberus: Beating Intox Manslaughter Cases

Register Now
Austin, TX

TCDLA Lone Star DWI

Beating Intoxicated Manslaughter Cases: Not Guilty v Cerberus

Lubbock, TX

TCDLA Prairie Dog Seminar

Attacking Blood Labs and Beating Intoxicated Manslaughter Cases

Charleston, NC

DUIDLA: Fall Seminar

Voir Dire & Cross in Blood Test Cases

Houston, TX

TDLA Top Gun DWI Seminar

Speaking with DA on DWI Trial Tactics. Voted #1 Speaker for this speaking engagement

Houston, TX

HYLA

How to Successfully Start and Manage a Law Firm

Houston, TX

State Bar of Texas

Advanced Criminal Law Seminar: Intoxilyzer 9000

San Antonio, TX

TCDLA 30th Annual Rusty Duncan Advanced Criminal Law

Intoxilyzer 9000

Houston, TX

South Texas College of Law

Professor Moses’ Openings and Closings Class: DWI Trial Tactics

Houston, TX

TCDLA Training Day

CLE: DWI Pretrial Motions to Suppress

Columbus, OH

Ohio Association of Criminal Defense Lawyers Best in the Midwest

Ohio Advanced DUI Seminar- Defense v. Prosecution DWI Techniques

Caribbean Sea

TCDLA President’s Cruise

CLE: Attacking the Drug Recognition Expert

Lubbock, TX

TCDLA Prairie Dog Seminar

Attacking the DRE Expert

San Antonio, TX

Stuart Kinard Memorial Advanced DWI Seminar

TIED FOR #1 SPEAKER: Defense v. DA Trial Tactics with Bexar County DA Nico LaHood

San Antonio, TX

TCDLA Stuart Kinard Advanced DWI Seminar

Speaking with Bexar County District Attorney Nico Lahood on DWI trial strategies from both sides

Tunica, MS

Tennessee Association of Criminal Defense Lawyers Annual DUI Seminar and Training

Not Guilty v. Goliath; Taking Down High Blood Tests Using the Disconnect Defense.

Houston, TX

TCDLA Top Gun DWI

Intoxilyzer 9000

San Antonio, TX

SACDLA Seminar

Intoxication Manslaughter Trial Tactics

Austin, TX

TCDLA 3rd Annual Lonestar DWI

TIED FOR #1 SPEAKER: Candida Albicans and the Autobrewery Syndrome

Dallas, TX

State Bar of Texas 42nd Annual Advanced Criminal Law Seminar

DWI Trial Tactics and Case Law Update

San Antonio, TX

TCDLA 29th Annual Rusty Duncan Seminar

TIED FOR #1 SPEAKER: DWI Voir Dire From Full Refusals to Intoxicated Manslaughter

Salt Lake City, UT

Utah Association of Criminal Defense Lawyers Advanced DWI Seminar

Not Guilty v. Goliath, Taking Down High Blood Tests Without an Expert

San Antonio, TX

TCDLA DWI Defense Project

DWI Blood Cross-Examination

San Antonio, TX

TCDLA, SACDLA, SABA 53rd Annual Anees Semaan Advanced Criminal Law Seminar

DWI Voir Dire From Full Refusals to Intoxicated Manslaughter

Columbus, OH

Ohio Association of Criminal Defense Lawyers Best in the Midwest

Not Guilty Versus Goliath; Taking Down High Blood Tests Using the Disconnect Defense

College Station, TX

TCDLA Upholding Justice One Client at a Time

VOTED #1 SPEAKER: DWI Techniques

San Antonio, TX

TCDLA Stuart Kinard Memorial Advanced DWI Seminar

Attacking the DRE Expert

Little Rock, AR

Pulaski County Bar Association – DWI Institute: My Case is a Wreck

Not Guilty v. Goliath & DWI Blood Test Disconnect Defense

Austin, TX

TCDLA 2nd Annual Lone Star DWI: Drugs

DWI Hallucinogens and Stimulants & Intoxilyzer 9000

Chicago, IL

DUIDLA

Blood Test Disconnect Defence and Cross Examination Techniques

San Antonio, TX

28th Annual TCDLA Rusty Duncan Seminar

Blood Testing Science and Case Law

Arlington, TX

TCDLA DWI Defense Project

TIED FOR #1 SPEAKER: Cross Examination of the Blood Analyst

San Antonio, TX

TCDLA, SACDLA, SABA 52nd Annual Anees Semaan Advanced Criminal Law Seminar

Not Guilty v. Goliath; Taking Down High Blood Tests Using the Disconnect Defense

Waco, TX

TCDLA Training Your Defense Team to Win

Jury Selection

Lubbock, TX

Annual Prairie Dog Advanced Criminal Law

TIED FOR #1 SPEAKER: Not Guilty v. Goliath; Taking Down High Blood Tests Using the Disconnect Defense

Denton, TX

Jolly Roger Seminar

DWI Blood Trial Tactics

San Antonio, TX

2014 Stuart Kinard Memorial Advanced DWI Seminar

VOTED #1 SPEAKER: Not Guilty vs. Goliath, Taking Down High Blood Tests with the Disconnect Defense

Dallas, TX

TCDLA: Cross Examination

TIED FOR #1 SPEAKER: Cross of DWI Blood Expert

Houston, TX

TCDLA: Top Gun DWI Seminar

Blood Test Voir Dire & Preparing the Jury for Acquittal

South Padre Island, TX

TCDLA Member’s Trip

VOTED #1 SPEAKER: Not Guilty vs Goliath & Taking Down High Blood Tests Using the Disconnect Defense

Austin, TX

TCDLA Lone Star DWI

VOTED #1 SPEAKER: Blood 101: Basics of Blood Testing & Taking Down High Blood Tests Using the Disconnect Defense

San Antonio, TX

27th Annual TCDLA Rusty Duncan Advanced Criminal Law Course

DWI Blood Testing Basic; What Works and What Doesn\'t

Humble, TX

Houston Bar Association at Summer Creek High School

Sex, Drugs and Alcohol; Keeping Kids Scared Straight

Longview, TX

TCDLA Trial Strategies that Work

VOTED #1 SPEAKER: Opening and Closing Statement

Houston, TX

Harris County Municipal Justice Bar Association Annual CLE

Trial Tactics From the Trenches

Houston, TX

Third Annual Hon. Craig Washington & Sen. Rodney Ellis Criminal Law Seminar

Advanced Trial Techniques

Lubbock, TX

TCDLA 33rd Annual Prairie Dog Lawyers Advanced Criminal Law

Basics of Blood Testing to Taking Down Big Blood Tests; How We Do It

Humble, TX

Houston Bar Association at Summer Creek High School

Knowing Your Rights; Sex, Drugs, DWI and Assault

Houston, TX

Houston Bar Association at Westside High School

Mock Trial Voir Dire

Houston, TX

TCDLA / Public Defender’s Office

Indigent Defense Advanced Trial Tactics

Houston, TX

TCDLA Top Gun DWI

10 Silver Bullets for DWI Trials

South Padre Island, TX

TCDLA Gideon’s Trumpet Seminar Series

Basics of Blood Testing; Attacking a DWI Blood Test

Houston, TX

HCCLA Training Day: Criminal Law 101

Trial Tactics from the Trenches

Arlington, TX

TCDLA DWI Defense Project

Basics of Blood Testing; Attacking a DWI Blood Test

Houston, TX

Harris County Public Defender

Closing Arguments – Storytelling

Waco, TX

TCDLA Gideon’s Trumpet Seminar Series

Basics of Blood Testing; Attacking a DWI Blood Test

Humble, TX

Houston Bar Association at Summer Creek High School

Knowing Your Rights; Sex, Drugs, DWI and Assault

Houston, TX

Harris County Public Defender

Closing Arguments – Storytelling

Houston, TX

Westlaw Ed. Center National Webinar

Basics of Blood Testing; Attacking a DWI Blood Test

Houston, TX

Houston Bar Association

Trial Tactics from the Criminal Trenches

Lubbock, TX

TCDLA 32nd Annual Prairie Dog Lawyers Advanced Criminal Law

Basics of Blood Testing; Attacking a DWI Blood Test

Humble, TX

Houston Bar Association at Summer Creek High School

The Importance of Jury Service and Knowing the Law

Georgetown, TX

TCDLA Gideon’s Trumpet Seminar Series

Basics of Blood Testing; Attacking a DWI Blood Test

Houston, TX

TSU Thurgood Marshall School of Law

Criminal Trial Clinic – DWI Trial Tactics and Voir Dire

Austin, TX

TCDLA TOP GUN DWI Seminar

Cross-Examination of Breath Test Technical Supervisor

Houston, TX

Harris County Criminal Lawyers Association CLE

Trial Tactics from the Trenches

Dallas, TX

TCDLA Boot Camp for Young Lawyers

DWI Trial Tactics and Skills

Houston, TX

TSU Thurgood Marshall School of Law

DWI Nuts and Bolts – DWI Voir Dire on High Breath Test with Accident

Houston, TX

TCDLA Voir Dire Seminar

Car Accidents and Hospital Enzymatic Assay Blood Testing

Houston, TX

Texas Criminal Defense Lawyers Assoc.’s Top Gun DWI Seminar

Final Argument

South Padre Island, TX

TCDLA Art of War Trial Tactics

The Game of Trial; Running the Bases

Houston, TX

South Texas College of Law Advanced Advocacy Class

The Game of Trial; Running the Bases

Tyler, TX

TCDLA Art of War Trial Tactics

The Game of Trial; Running the Bases

Edinburg, TX

TCDLA Art of War Trial Tactics

The Game of Trial; Running the Bases

San Antonio, TX

National College of DUI Defense/Texas Criminal Defense Lawyers Assoc.’s Stuart Kinard Advanced DWI Seminar

TIMBER! Chopping Down High Breath Tests without an Expert

Houston, TX

Network of Professional Brazilians in Houston

Understanding Your Rights in Texas and Secrets to Avoiding a DWI Arrest and Conviction

Houston, TX

North Shore Senior High School

Keeping Students Safe from DWI and Drugs

Galveston, TX

Galveston County Criminal Defense Lawyers Assoc. CLE

TIMBER! Chopping Down High Breath Tests

Conroe, TX

Montgomery County Criminal Defense Lawyers Assoc. CLE

New Issues in Montgomery County – Death to the \"E\" Jury; Getting a Fair Trial

Dallas, TX

David Burrows DWI Defense Project

The Game of Trial; Running the Bases

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