When your freedom is on the line, “good enough” isn’t good enough. There’s no shortage of attorneys here in Harris County, but there’s a significant difference between having a law license and knowing how to win. So, how do you actually know who’s worth trusting? How do you choose a criminal defense lawyer?
Here’s what separates highly qualified criminal defense lawyers in Houston from the rest:
- Board certifications that verify real, tested expertise
- A scientific edge that can challenge forensic evidence that other attorneys wouldn’t know how to question
- A proven trial record with Not Guilty verdicts won in open court, not just favorable plea deals
- Recognition from independent legal organizations that don’t hand out accolades lightly
- A reputation built on client results, with reviews that reflect what it actually feels like to be represented well
High-level criminal defense attorneys aren’t hard to identify when you know what to look for. As we’ll expand on below, there is a reason these qualities consistently separate the attorneys who win from the ones who just show up.
“The Thiessen Law Firm is definitely one of the best in Houston and possibly nationally. What a blessing this law firm is for all of us who face legal difficulties. Their communications and attention to detail are obvious. Experts like the Thiessen Law Firm deserve their wonderful, caring reputation.”
— Dr. Carlos, Google review
Board certifications
Most people don’t realize how rare board certification actually is. When you’re searching for a qualified criminal defense lawyer in Houston, the vast majority of attorneys you’ll encounter have never pursued it.
Board certification isn’t something you can buy or inherit — it requires rigorous testing, peer evaluation, and demonstrated courtroom experience. Each certification is independently verified and signals a level of expertise that a standard law license simply doesn’t. When your future is on the line, that distinction matters enormously.
| Real-world example: Mark Thiessen is quadruple board certified in Criminal Law, DWI Defense, DUI Law, and Criminal Trial Law — making him one of the most credentialed criminal defense attorneys in the country. |
ACS-CHAL lawyer scientist designation
Most attorneys know the law. Far fewer understand the science behind it. In criminal cases — especially those involving DWI, drug charges, or forensic evidence — the science is often where cases are won or lost.
When prosecutors lean on lab results and breathalyzer readings as slam-dunk evidence, an attorney with this designation will know exactly where to look for flaws, procedural errors, and faulty science that can unravel a case. If you’re wondering what happens after a felony indictment, and fear that you’ve got no shot because of the evidence, the answer may look different than you fear.
| Real-world example: As a lawyer scientist — a designation held by only a select group of attorneys nationwide — Mark Thiessen has invested years into understanding the chemistry, biology, and forensic methodology behind DWI testing, blood draws, and toxicology results. That knowledge is a weapon in the courtroom. |
Proven trial record
Credentials matter, but results are what count. Any attorney can claim to be aggressive or experienced — but the only thing that truly reflects a lawyer’s ability is what happens when they stand in front of a jury.
These aren’t soft wins or favorable plea deals dressed up as victories. These are jury verdicts, fought and won in open court against prosecutors who were confident they had the upper hand. If you’re looking for a criminal defense attorney Harris County residents trust when the stakes are highest, this type of track record says more than any marketing ever could.
| Real-world example: As one of the most battle-tested Texas criminal law attorneys practicing today, Mark Thiessen has secured 140+ Not Guilty verdicts — across DWI, assault, drug charges, intoxication manslaughter, and some of the most serious criminal cases in Harris County courts. |
Recognition from independent legal organizations
Not all accolades are created equal. There’s a difference between an award you apply for and recognition earned through independent research, peer nomination, and demonstrated performance.
Among the most famous Houston lawyers, the ones who consistently rise to the top are those who have proven themselves in the most demanding cases — not just the easiest ones to win. This kind of recognition doesn’t go to attorneys who settle for good enough. It goes to attorneys who consistently outperform their peers when the justice system has the odds stacked against them.
| Real-world example: Mark Thiessen is the only DWI attorney in the state of Texas to be selected to the Top 100 Super Lawyers list in both Texas and Houston — a distinction earned not by application, but through independent research and peer nomination. |
Strong reputation built on client results
Peer recognition matters, but so does what clients actually experience. The best criminal defense attorneys don’t just win in court — they communicate clearly, remain accessible when it matters most, and make sure their clients never feel like just another case number.
A strong client reputation is built over years of honest communication, 24/7 availability, and delivering outcomes that change people’s lives. When you’re searching for a top Houston criminal defense lawyer you can actually trust, that kind of record matters just as much as the verdicts.
| Real-world example: With a 4.9-star rating on Google and a 99% client satisfaction rating on Avvo, the numbers reflect what client after client says in their own words: this firm fights for you, keeps you informed, and delivers. |
Hiring a criminal defense lawyer — FAQs
What questions should I ask a criminal defense lawyer before hiring them?
Ask about their board certifications, their trial record, and how many cases like yours they’ve taken to verdict — not just to a plea deal. You’ll also want to know who will actually be handling your case day-to-day, and whether the attorney you’re meeting with is the one who will show up in court.
The answers to these questions will tell you very quickly whether you’re talking to someone who wins cases or someone who processes them.
What are the red flags to watch out for when hiring a criminal defense attorney?
Be wary of any attorney who guarantees a specific outcome, pressures you into a quick decision, or can’t clearly articulate a strategy for your case. Vague answers about their trial experience, a lack of board certifications, and difficulty getting someone on the phone are all signs that you may not be getting the level of representation your situation demands.
When your future is at stake, trust your instincts — if something feels off in the consultation, it probably is.
Should I use a public defender or hire a private criminal defense lawyer?
Public defenders are dedicated attorneys, but they carry enormous caseloads that make it nearly impossible to give any single case the time and attention it deserves. A private criminal defense lawyer can dedicate significantly more resources to investigating your case, challenging evidence, and building a defense strategy tailored specifically to your situation.
If the charges you’re facing carry serious consequences — jail time, a permanent record, loss of employment — the investment in private representation is almost always worth it.
When experience matters most in a criminal defense case
Experience matters most when the evidence against you looks overwhelming — because that’s exactly when a skilled attorney knows where to look for cracks in the prosecution’s case. Serious charges like felonies, repeat offenses, and cases involving forensic or scientific evidence require an attorney who has been in those situations before and knows how to navigate them.
An attorney with a proven trial record isn’t just more prepared — they’re more respected in the courtroom, which can make a meaningful difference in how your case unfolds.
140+ Not Guilty verdicts and counting — let’s make yours next.
Knowing how to choose a criminal defense lawyer is half the battle. The other half is making sure the attorney you choose actually shows up and fights. At Thiessen Law Firm, those two things are never in question.
If you’re looking for the best Houston criminal lawyers for your specific case, you’ve got to give Thiessen Law Firm a call on your search. Mark Thiessen and his team are known for 24/7 accessibility, honest communication, and treating every client like their case is the only one on the docket. From the first consultation to the final verdict, you’ll never feel like you’re navigating the justice system alone.
A charge is not a conviction — but the window to build a strong defense doesn’t stay open forever. The sooner you have an experienced attorney in your corner, the better your chances of walking away with your life intact. With 140+ Not Guilty verdicts and a reputation built on results, Mark Thiessen and his team know their way around Harris County courts and are ready to fight for you — call Thiessen Law Firm today at (713) 864-9000 or contact us online.
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