DWI Defense Attorney in McKinney, TX

A DWI arrest can feel like your life gets put on fast-forward. You may have been taken to jail, had your vehicle towed, and been released with paperwork you barely had time to read. You may also be facing an immediate threat to your driver’s license before you have even had your first court setting. The stress is real, and the consequences can reach into your work, your family, and your reputation.

My name is Paul Key. I am a criminal defense attorney serving McKinney and the surrounding North Texas area, including Collin County and Dallas County. I have been practicing law since 1996. I served as an Army JAG and worked in the Collin County District Attorney’s Office before dedicating my private practice to criminal defense. If you want a lawyer who will defend you instead of pressuring you to plead guilty, call me. I will speak with you in confidence about your case and explain what it would cost for me to defend you through trial.

Call now for a confidential consultation. If you prefer, you can also schedule a call on our website booking form.

If you were arrested for DWI, what matters right now

DWI cases are time-sensitive, especially when your license is at risk, and what you do early can matter. If you were given paperwork at the jail or after a stop, keep it. If you were asked to take a breath or blood test—or if you refused—the details surrounding that request matter. Do not assume that a “first offense” means “no big deal,” and do not assume you have to plead guilty because you were arrested. An arrest is not a conviction, and a DWI case is often defensible when it is handled correctly. If you are serious about protecting your license and your future, the best time to get help is immediately.

Preserve evidence and details

Keep all paperwork, and note everything about any breath or blood test request or refusal.

Avoid damaging assumptions or statements

Do not discuss the case if law enforcement contacts you again; use your right to remain silent and have counsel communicate for you.

Follow all legal obligations

Do not miss a court date, and if you are on bond, follow every condition precisely.

A DWI arrest is built on steps that can be challenged

Many DWI cases appear strong on the surface because an officer made an arrest and a prosecutor filed charges. The reality is that a DWI case is only as strong as the process behind it. A traffic stop, the officer’s observations, field sobriety tests, breath or blood testing, and paperwork are all points where mistakes happen.

My job is to identify weaknesses and challenge the evidence when the law and facts support it. That can include questioning:

Whether the officer had a lawful basis for the traffic stop

Whether the investigation was conducted properly

Whether field sobriety tests were administered correctly and interpreted fairly

Whether breath or blood testing was performed accurately and documented correctly

Whether statements attributed to you are reliable and complete

Whether the State can prove impairment beyond a reasonable doubt

DWI defense is not about excuses. It is about evidence, procedure, and making the State prove its case.

How I defend DWI cases

I approach DWI defense by focusing on facts, timelines, and proof. That starts with a clear understanding of the stop and everything that happened from the first contact through arrest, booking, and release.

When I defend a DWI case, I typically focus on:

● Obtaining and reviewing offense reports, dash and body camera video, and any available audio

● Examining the reason for the stop and whether it was legally justified

● Evaluating the field sobriety tests and whether they were performed and scored correctly

● Reviewing breath test procedures, calibration, and documentation when a breath test is involved

● Reviewing blood draw procedures and chain of custody when a blood test is involved

● Identifying suppression issues when evidence was gathered unlawfully

● Preparing the case as if it might need to go to trial

Some cases resolve without trial. Some should be tried. Either way, you should not be pressured into a guilty plea without a careful review of the evidence and the consequences.


If you want a McKinney DWI lawyer who will take the case seriously and prepare it properly, call me.

Common DWI situations I handle

Every case has its own facts, but these situations are common in DWI arrests in Collin County and Dallas County:

A routine traffic stop or accident investigation that escalated into a DWI before evidence was fully tested

A refusal case where the State relies heavily on officer interpretation

A case involving fatigue, medication, or a medical condition that mimics impairment

A case where field sobriety tests were done on uneven ground, in poor lighting, or under stress

A case where bodycam or dashcam video conflicts with the written report

A case involving a higher alleged alcohol concentration, increasing risk and exposure

If you are not sure what applies to your situation, call and we will walk through the details.

Your driver’s license and why DWI cases can be two cases at once

Many people are surprised to learn that a DWI case can involve both the criminal charge and separate license-related consequences. These issues can move on different timelines, and ignoring the license problem can create avoidable damage.


If your ability to drive is essential for work, family, or medical needs, you should not leave this to chance. The key is addressing the situation early and with a plan.


If you are dealing with a DWI arrest in McKinney, TX 75070 or nearby, call me and we will talk about the path forward.

What you may be risking in a DWI case

The consequences of a DWI depend on the facts, your record, and the evidence. A responsible lawyer will not promise outcomes without reviewing the case. What I can do is help you understand what is at stake and defend the case with preparation and clarity. Depending on the situation, consequences can include:

Jail exposure and a permanent criminal record

Probation or community supervision

Fines, court costs, and program requirements

Driver’s license consequences and restrictions

Increased insurance costs and financial impact

Employment and professional licensing consequences

A DWI is not a situation to handle casually. It can follow you for years.

Why local experience matters in McKinney, Collin County, and Dallas County

DWI cases are defended in local courts with local procedures and local expectations. I have practiced law since 1996, including service as an Army JAG and work in the Collin County District Attorney’s Office. My private practice has been dedicated to criminal defense, and most of my cases are in Collin and Dallas Counties. That local familiarity matters when you are trying to navigate a stressful process and protect your future.

If you were arrested for DWI in or near McKinney, call me.

Real Clients. Real Results.

"BAM, I WON MY CASE"

"Paul made me cry the moment he called me my case was dismissed. Happiness tears!!!! I'm so happy I got him to represent me. I went based off reviews from here when I searched him up. And he is so upfront and honest. I wasn't going to go to trial for my DWI case. But him telling me my case was winnable made me trust in his word, and BAM, I WON MY CASE. I will forever be grateful for your work."

Ana R.

"I Beat the DUI and Gun Charge"

"My life was on the verge of falling apart facing a DUI and a gun charge…I was referred to Paul through a good friend and he was worth every red cent. He knows his stuff, has great connections in the courts and knows the approach prosecution will most likely take. I beat the DUI and gun charge and I cant thank Paul enough. I am forever indebted to Paul.

Terrance F.

"Helped Relive A lot of Stress"

"Paul was so helpful and kind during the whole process! He helped relieve a lot of stress that I was facing and we ended up with the best case scenario. Can’t be more thankful to work with Paul."

John V.

"Responsive, Open, & Clear Expectations"

Paul is very responsive with his clients, is always open, and clear about expectations. He was key in helping me clear my record of all charges that I received in my youth.

Daniel M.

Frequently Asked Questions

Clear answers to help you make a confident decision.

Should I plead guilty if it is my first DWI?

Not without understanding the evidence and the long-term consequences. A guilty plea can affect your driving record, insurance, employment, and more. The right decision depends on proof and risk, not on pressure.

What if I refused a breath or blood test?

Refusals can create separate issues, and the State may still attempt to prove impairment using officer observations and other evidence. The details matter. Call so I can evaluate your situation and explain how it impacts the case.

What if I took a test and the number was high?

A test result is not the end of the defense. The reliability of the test depends on procedures, timing, documentation, and other factors. It needs to be reviewed carefully with the full file.

Do field sobriety tests prove I was intoxicated?

They are tools officers use, but they are subjective and can be affected by stress, medical issues, fatigue, footwear, the surface you were tested on, and how instructions were given. Video often matters more than the officer’s summary.

Will I lose my license?

License consequences depend on the facts, your history, and what steps are taken early. DWI cases often include time-sensitive license issues, which is one reason calling quickly matters.

How much does it cost to hire a DWI lawyer?

Fees depend on the complexity of the case and what it will take to defend it properly. After I understand what you are facing, I will explain the fee and what it covers.

Can you help if my DWI involved an accident?

Yes. Accident cases require careful handling because assumptions get made early and evidence can be interpreted unfairly. The defense needs to focus on the actual proof, not conclusions.

What happens when I call?

If you are facing a DWI charge, you likely want quick answers and a plan. When you contact my office:

● We will have a confidential conversation about what happened and what paperwork you were given

● I will explain the immediate priorities, including deadlines and next steps

● If we decide to work together, I will explain my fee and what representation covers

Call now for a confidential consultation or schedule a call on our booking form.

Talk with a McKinney DWI defense attorney

If you were arrested for DWI in McKinney, Collin County, or Dallas County, you need a defense strategy built on evidence, procedure, and preparation. You also need a lawyer who will defend you rather than pushing you into a quick plea because it is easier for the system.

I have practiced law since 1996, served as an Army JAG, and worked in the Collin County District Attorney’s Office before dedicating my private practice to criminal defense. If you want a confidential, direct conversation about your DWI arrest and what to do next, call me.

Call now for a confidential consultation or schedule a call through my website booking form.