Controlled Substance Or Drug DWI Lawyer In Conroe, TX
When the state says a drug rather than alcohol caused the impairment, the breath machine drops out and the case rests on a blood sample, an officer's observations and a lab report that can take weeks. This page covers what the state must prove, the penalties, how the evidence is built and tested, and the license deadline that can still apply.
What Is A Drug DWI In Texas?
A drug DWI is a charge of driving while intoxicated under Penal Code § 49.04 where the state says a drug, controlled substance or combination caused the intoxication. Texas sets no legal limit for drugs. The state has to prove the driver lacked the normal use of mental or physical faculties because of the substance while operating a vehicle in a public place.
Source: Texas Penal Code Chapter 49, Intoxication and Alcoholic Beverage Offenses
Understanding Texas Law
How Does Texas Law Define A Drug DWI?
Texas has no separate crime called drug DWI. A driver accused of being impaired by a drug is charged under Penal Code § 49.04, the same statute used for alcohol, and faces the same penalty scale.
The difference sits in the definition of intoxicated. Section 49.01(2) gives two ways to meet it. One is an alcohol concentration of 0.08 or more. The other is the loss of normal use of mental or physical faculties caused by alcohol, a controlled substance, a drug, a dangerous drug, a combination of those, or any other substance put into the body.
A drug case can only use the second route. No drug has a legal limit, so no lab value proves intoxication by itself.
To convict, the prosecution has to link three things: a substance was in the driver's body, the driver had lost normal use of mind or body, and the substance caused that loss at the time of driving. Under § 49.11, the state does not have to prove the driver knew the substance would impair them.
What the state has to prove in a drug DWI:
- The person was operating a motor vehicle in a public place in Montgomery County
- The person had lost the normal use of mental or physical faculties
- A drug, controlled substance or combination caused that loss
A drug file differs from an alcohol file in several ways. A breath test cannot confirm or rule out a drug. The officer's description of the driver carries more weight. A drug recognition evaluator may be called in after the arrest, and the driver's own answers about medication often end up in the report.
The substance groups behind these arrests are set out on which drugs lead to a DWI charge.
Penalties And Consequences
What Are The Penalties For A Drug DWI In Texas?
The sentence range does not change because the substance is a drug. What changes is the evidence and the timeline, since drug blood testing is slower than a breath result. These are statutory limits, not predictions.
A Class B misdemeanor.
Court costs are extra.
Ordered by the court (§ 521.344).
Two years with a prior alcohol or drug contact.
- Classification
- Class B misdemeanor for a first offense under § 49.04. A prior DWI conviction makes it Class A, and two priors make it a third degree felony.
- Jail
- 72 hours to 180 days for a first offense.
- Fine
- Up to $2,000 for a first offense, before court costs.
- License after conviction
- A court ordered suspension of 90 days to one year for a first conviction (§ 521.344).
- Administrative license case
- A refusal can start the ALR process. A drug result alone is not the trigger chapter 524 describes, which is tied to an alcohol concentration.
- Drugs found in the car
- A possession charge can be filed as its own case alongside the DWI.
- Probation
- A judge can order community supervision in place of some or all of the jail time, with conditions the judge sets.
A drug DWI counts as a prior in the same way an alcohol DWI does, and Texas sets no lookback period. That makes a first case matter for any later one.
Real Questions
What Do People Ask About A Drug DWI In Texas?
Can an officer draw my blood if I say no?
What does a refusal cost me on the license side?
Why does the drug recognition evaluation matter?
Can I be charged if the lab found only a trace?
Possible Defenses
How Can A Drug DWI Be Defended?
A drug file has more moving parts than a breath test case, and each can be tested. An attorney reviews the stop, the officer's observations, any drug recognition evaluation, the blood collection and the lab file to see what the state can prove. No result can be promised.
The central question is the link between a substance and the driving. A lab report says whether a substance, or something the body made from it, was in the sample. It does not say how much was present at the moment of driving, or whether that amount impaired anyone.
The warrant, the draw and the lab.
A blood sample taken under a No Refusal warrant still has to hold up. A court reviewing the warrant looks at what the officer wrote in the sworn affidavit, not at what the officer later remembers. Boilerplate language, missing observations or details the video contradicts can all become issues.
Some drugs leave inactive breakdown products long after any effect has passed, tolerance differs between people, and the draw can come hours after the driving.
The Stop And The Draw
Was there a legal basis for the stop, and was the blood taken by real consent or a warrant sound on its face?
The Chain Of Custody
Who drew the blood, where, and was the sample kept intact until it reached the lab?
The Lab Confirmation
Did the lab confirm a screening result with a second, more specific method?
Active Drug Or Metabolite
Is the compound reported an active drug or an inactive breakdown product?
The Observations
Do the officer's notes fit the known effects of the drug the lab found?
The Refusal Warning
Was the statutory warning given before a refusal was recorded?
Local Process
What Happens After A Drug DWI Arrest In Montgomery County?
Booking, bond and the evidence process follow Texas law across the state. Who investigates, where the case is filed and where a person is held are specific to Montgomery County. The No Refusal program runs weekends, holidays and selected enforcement periods, publicized in advance.
The Request For A Sample
The officer asks for breath or blood. In a drug case a breath result of zero does not end the matter, and a refusal during a No Refusal period can lead to a warrant application.
Booking And Bond
The driver is taken to the Montgomery County Jail while the blood sample goes to a laboratory.
The 15 Day License Window
A hearing request goes to DPS inside the deadline for a judge of the State Office of Administrative Hearings to hear the license case, long before any toxicology report exists.
The Lab File And Discovery
The screen, the confirmation test and the paperwork behind both become part of the case, and the defense requests them under article 39.14.
- Where it is filed
- A misdemeanor drug DWI is filed in one of the Montgomery County Courts at Law and prosecuted by Montgomery County District Attorney's Office. A felony is heard in the district courts at the Montgomery County Criminal Justice Center on 207 W Phillips St, with the Montgomery County District Attorney's Office prosecuting. The two sit in different buildings in Conroe.
- Who makes the arrest
- Conroe Police Department, Montgomery County Sheriff's Office, Texas DPS Highway Patrol, Montgomery County Constables, Precincts 1 through 5, Willis Police Department, Shenandoah Police Department, Oak Ridge North Police Department, Magnolia Police Department, Splendora Police Department, or Roman Forest Police Department, sometimes with a drug recognition evaluator called in afterward.
- Where you are booked
- The Montgomery County Jail at 1 Criminal Justice Drive, run by the Montgomery County Sheriff's Office.
- If the case is appealed
- Appeals go to the Ninth Court of Appeals in Beaumont.
The roadside tests were built around alcohol, which the breath and field sobriety testing page explains. The license side is heard at an ALR hearing, where the arresting officer can be questioned under oath.
Next Steps
What Should You Do After A Drug DWI Arrest?
The lab may take weeks, yet a license deadline runs from the notice and not from the lab report. These steps are general information, not advice for any one person.
Find The Notice
If you refused a specimen, find the notice of suspension and count 15 days from the day you received it.
List What You Took
Write down every medication and substance in the days before the stop, with doses and times.
Keep Medical Records
Keep prescriptions, pharmacy records and any notes from your prescriber.
Record The Timeline
Note when you were stopped, tested and had blood drawn, and how long each step took.
Keep The Paperwork
Save the citation, bond papers, property receipts and any lab notices.
Do Not Trust The Number
A lab result shows presence, not impairment. It is one piece of evidence.
Many people assume a lab result settles the case, and it does not. Mitchell Law Firm offers a confidential conversation about a drug DWI charge in Montgomery County. Calling early keeps the evidence review and any license deadline in view.
Official Texas Sources
Read The Law Behind This Page
- Texas Penal Code Chapter 49: DWI offense, intoxicated definition, §§ 49.10 and 49.11
- Texas Penal Code Chapter 12: Class A and Class B misdemeanor punishment
- Texas Transportation Code Chapter 724: Implied consent, refusals and blood specimens
- Texas Transportation Code Chapter 524: Administrative license suspension
- Texas Transportation Code Chapter 521: License suspension after a DWI conviction
- Texas Health and Safety Code Chapter 481: Texas Controlled Substances Act
- Texas Code of Criminal Procedure Chapter 39: Discovery of the state's evidence
Who Handles Your Case
The Texas Lawyer Who Speaks Science
Attorney Brennon Mitchell isn't just a seasoned Conroe trial lawyer. He's one of the few in Texas, and the entire country, to earn the prestigious title of an ACS-CHAL Forensic Lawyer-Scientist. That means he's gone beyond the courtroom and into the laboratory, receiving in-depth, hands-on training in forensic chromatography, the same kind of testing used by crime labs to try and convict Texans every day.
What does that mean for you?
It means when the state uses blood alcohol or drug testing to try to prove its case, Mr. Mitchell knows how to challenge it. He's trained to:
- Analyze lab results and spot faulty science
- Cross-examine forensic experts with precision
- Break down complex chemical evidence in plain language for juries
This is not the kind of background you find in most criminal defense attorneys, and it could make the difference between a conviction and a clean slate.
Brennon graduated from Texas A&M University School of Law and practices from offices in Orange and Conroe.
Client Reviews
What Clients Say About Brennon Mitchell
Prior results do not guarantee a similar outcome. Every case is different and is decided on its own facts.
Related DWI Charges
Other DWI Cases Handled In Conroe, TX
A drug DWI can overlap with several neighboring charges, depending on the substance and the driver. See the full DWI defense overview for Conroe.
First, Repeat And Felony DWI
Priors never expire in Texas, and a second or third charge moves the case into a different range entirely.
Drug And Substance DWI
You do not need alcohol to be charged. Prescriptions and legal hemp products lead to DWI arrests in Montgomery County.
The Driver And The Vehicle
Age, license type, home state, and what was being operated all change where the same stop leads.
Your License And The Process
The evidence, the deadlines, and what a conviction reaches beyond the courtroom.
Health Care Licenses
Boards that license patient care run their own review of an alcohol arrest, separate from the court.
Other Professional Licenses
Law, finance, aviation, teaching, real estate, and security work each answer to their own board or agency.
Common Questions
Drug DWI Questions People In Conroe Ask
Why is blood the only chemical test in a drug DWI in Conroe, TX?
Breath instruments used in Texas DWI cases measure alcohol concentration and cannot identify other drugs. When the state says a drug caused the impairment, its chemical evidence has to come from a blood sample, collected by consent or under a search warrant and then analyzed by a laboratory. That sample, how it was obtained and how it was tested are central parts of the case.
What is the No Refusal program in Montgomery County?
Montgomery County runs a No Refusal program on weekends, holidays and announced enforcement periods, funded through TxDOT and run with the District Attorney's Office. A driver who declines testing during one of those periods does not end the process. A prosecutor drafts a blood search warrant, an on-call judge reviews it for probable cause, and a signed warrant allows a nurse to draw blood over the driver's objection.
Does Texas set a drug level that counts as intoxicated for drivers in Conroe, TX?
Texas law contains no numeric threshold for any drug. The 0.08 figure in Penal Code § 49.01(2) applies only to alcohol. For a drug, the state has to prove the driver had lost the normal use of mental or physical faculties because of the substance. A blood result showing the drug is present is evidence the state can offer, not a legal line.
Can a Montgomery County DWI rest on alcohol and a drug together?
The definition of intoxicated in Penal Code § 49.01(2) expressly covers a combination of two or more substances. A breath or blood alcohol result below 0.08 does not end a case where the state also alleges a drug. The prosecution then relies on the loss of normal use standard and has to tie the combination to what happened behind the wheel.
Can a prescribed medication lead to a DWI charge in Conroe, TX?
Penal Code § 49.10 says it is not a defense that the person was entitled to use the substance. A valid prescription does not change the elements of the offense. The question stays whether the medication, alone or with something else, caused a loss of normal use of mental or physical faculties while driving in a public place.
What penalties does a drug DWI carry in Montgomery County?
The penalty range is the same as for an alcohol DWI under Penal Code § 49.04. A first offense is a Class B misdemeanor with 72 hours to 180 days in jail and a fine of up to $2,000. One prior DWI conviction makes it a Class A misdemeanor, and two prior convictions make it a third degree felony.
Mitchell Law Firm, PLLC
A Drug DWI Rests On A Blood Draw And An Opinion
Both can be examined. Any license deadline started when the notice was received, not when the lab report comes back.
Conroe Office
