Frisco DWI Lawyer
Science-driven DWI defense for Frisco arrests on either side of the county line: Collin County cases in McKinney, Denton County cases in Denton, handled from our Allen and Denton offices.
- Two ACS-CHAL Forensic Lawyer-Scientists
- Former Dallas County Prosecutor
- Author, The Texas DWI Manual
- 500+ Cases Tried to Verdict
At no cost · Answered 24/7 · You have 15 days from the notice of suspension to request your ALR hearing
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Recent Collin County DWI Results
Every case gets forensic-level attention. These are recent outcomes for people facing DWI charges in Collin County.
Meet our trial teamIntoxication Manslaughter
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Past results do not guarantee a similar outcome. Every case is fact-specific. Client names and identifying details have been omitted for privacy.
Facing a DWI in Frisco?
Deandra Grant Law defends people charged with DWI in Frisco, from a first offense to high-BAC, repeat, and felony charges, including DWI with a child passenger, intoxication assault, and drugged driving. Frisco is the one city in our North Texas markets where the first question is not what the charge is but which county has it. Part of the city sits in Collin County and part in Denton County, and the county of the arrest, not your address, decides the prosecutor, the courthouse, and the programs available to you.
That is why Frisco cases are covered from two offices. Our Allen office is fifteen minutes down US-75 from the Collin County courts in McKinney, and our Denton office sits directly across McKinney Street from the Denton County Courts Building. A firm that appears in only one of those courthouses has to hand off half of Frisco. We work both every week. The team is led by managing partner Deandra Grant, a former prosecutor with more than 30 years of trial experience who wrote The Texas DWI Manual, and partner Douglas Huff, an ACS-CHAL Forensic Lawyer-Scientist. When the State’s case rests on a breath number or a blood draw, we go to the underlying science.
Getting started costs nothing. Call or schedule online to talk through what happened. The license clock does not wait while you work out which county has your case: you have 15 days from the notice of suspension to request an ALR hearing.
Arrested in the last 15 days?
Your license is on its own clock. It starts when you receive the notice of suspension, which in a blood case often arrives by mail weeks later.
Frisco DWI Charges We Handle
Every Frisco DWI charge, from a first offense to intoxication manslaughter, in either county.
First-Offense DWI
Driving while intoxicated with no prior convictions, a Class B misdemeanor.
First DWI penaltiesSecond DWI
A DWI with one prior conviction, a Class A misdemeanor with mandatory jail time.
Second DWI penaltiesThird DWI
A DWI with two prior convictions, a third-degree felony carrying two to ten years.
Third DWI penaltiesDWI with Child Passenger
A passenger under fifteen turns a misdemeanor DWI into a felony.
Why this is a felonyIntoxication Assault
Causing serious bodily injury to another while intoxicated, a third-degree felony.
Assault penaltiesIntoxication Manslaughter
Causing a death while intoxicated, a second-degree felony carrying prison time.
Manslaughter penaltiesUnderage DWI
Drivers under twenty-one face DUI charges for any detectable amount of alcohol.
DWI vs. DUIDrug DWI
A DWI where the intoxicant is a drug, prescribed or illegal, with no breath number involved.
How they prove itMarijuana DWI
Marijuana and edibles can support a DWI without any measurable level.
The marijuana rulesPrescription Drug DWI
A valid prescription is no defense if the medication impaired your driving.
Prescription rulesBoating DWI (BWI)
Operating a boat while intoxicated, prosecuted much like a driving DWI.
The BWI rulesWhat Actually Happens to a DWI in Frisco
Frisco runs on two counties' rules. These are the local specifics that shape a defense here.
Which county has your case
Frisco straddles the Collin and Denton county line, and the county of the arrest decides everything downstream. Your bond paperwork and notice of suspension name the county and the court. Do not guess from your address; the arrest location governs.
Where your case is heard
Collin County side: the Russell A. Steindam Courts Building at 2100 Bloomdale Road in McKinney, misdemeanors in the County Courts at Law and felonies in the District Courts. Denton County side: the Denton County Courts Building at 1450 E. McKinney Street in Denton, with the same misdemeanor and felony split.
Who prosecutes
A Frisco PD arrest is charged by the Collin County District Attorney or the Denton County District Attorney, depending on the side of the line. Collin has a stated policy against reducing a DWI to obstruction of a highway, which pushes those cases toward the evidence. Denton prosecutes through a dedicated DWI Unit.
Where your blood goes
Both counties send DWI blood to the DPS crime lab in Garland, and both run no-refusal periods when a refusal can turn into a warrant and a blood draw the same night. The lab's chromatography, calibration, and quality control records are discoverable, and we request them in every blood case.
Diversion depends on the county
Collin County runs the Burden to Blessing program and a Veterans Court. Denton County runs a DWI Treatment Court and a Veterans Court. They are different programs with narrow eligibility, so a strategy built around one has to be built around the right one.
Why Collin County Clients Choose This Firm
What decides a DWI case is how well your lawyer understands the evidence.
What We Do on Every Case
From the first call, in order:
- Request your ALR hearing before the 15-day deadline and use it to question the officer under oath.
- Demand the dash and body camera video before it is destroyed.
- Pull the full discovery file: offense report, calibration and maintenance logs, lab records, certifications.
- Read the underlying chemistry ourselves: the chromatograms and the QC data, not the summary report.
- Re-score the field sobriety tests against NHTSA protocol, on video.
- File the motions the evidence supports, because suppression is how DWI cases end.
- Build your mitigation file, with clinical assessments, at no cost to you.
- Try the case if the offer is not right. Prosecutors know which firms try cases.
We quote a flat fee after a consultation at no cost to you, so the investment is known before you commit.
What Collin County Clients Say
613 verified reviews and counting. Real Texans, real charges, real outcomes.
They are very responsive to requests and questions. Doug went above and beyond to fight for me and get the best possible deal I could in Collin County. I even had questions during probation and they were quick to answer and help (which they didn't have to do).
My son was facing possible prison prison time, I was afraid. But by the Grace of God I found Deandra Law Firm where Doug and Jada both worked awesome deals for my son in both counties he was facing..no prison. Thank you for being team Vick for us
Deandra Grant Law is top-notch! I was provided with great resources from day one. Elena was also super helpful and patient! They're the perfect team to guide you through a tough time.
Frisco DWI Attorneys in the McKinney and Denton Courts
Forensic-science training, three decades in the Collin and Denton County courts, and the courtroom record to back it up.
As Seen In
Serving Frisco and Its Neighbors
We defend DWI cases across Frisco and the cities around it: Plano, McKinney, Allen, Little Elm, The Colony, and Prosper. Frisco arrests on the Collin County side are prosecuted in McKinney, and the Denton County side is heard in Denton. We work both courthouses every week.
The full county walkthroughs are on Collin County DWI Lawyer and Denton DWI Lawyer, and the courthouse guides at Collin County courts and Denton County courts. Facing a non-DWI charge? See Frisco Criminal Defense Lawyer.
The Star, Stonebriar, and the Tollway
Frisco PD and DPS stops along the Dallas North Tollway, SH-121, and Preston Road on the eastern side of the city are Collin County cases heard in McKinney.
The Denton County side
West of the county line, toward Little Elm and Lake Lewisville, a Frisco arrest is prosecuted by the Denton County DWI Unit and heard at the Denton County Courts Building. Our Denton DWI lawyer page walks through that court.
Our Allen Office
Fifteen minutes from the Collin County courts in McKinney. Frisco cases on the Denton County side are handled from our Denton office, directly across the street from the Denton County Courts Building.

Allen, TX 75013 (972) 848-8828
At no cost and confidential, in person, by phone, or by video.
Surface and covered parking at no cost on site at the Atrium building, with visitor spaces near the main W. McDermott Drive entrance.
Directions to the Allen Office
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From Russell A. Steindam Courts Building (McKinney)
From 2100 Bloomdale Road, take US-75 South and exit W. McDermott Drive in Allen. Turn right and continue west; the Atrium building is at 1333 W. McDermott.
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From US-75 / Central Expressway
Exit W. McDermott Drive and head west toward Alma Road. The Atrium at 1333 W. McDermott is just past the Watters Road intersection.
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From Plano
Take US-75 North, exit W. McDermott Drive in Allen, and turn left across the highway. Continue west to 1333 W. McDermott.
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From Frisco / Sam Rayburn Tollway (SH-121)
Take SH-121 east to US-75 North, then exit W. McDermott Drive and head west.
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From Downtown Dallas
Take US-75 North (Central Expressway) to Allen, exit W. McDermott Drive, and turn left across the highway.
Also From This Office
- Allen DWI Lawyer Science-driven DWI defense for Allen arrests, prosecuted at the McKinney courts.
- Collin County DWI Lawyer DWI defense across the county, from Plano and Frisco to McKinney and Wylie.
- Allen Criminal Defense Lawyer Misdemeanors and felonies across Collin County, defended by a trial-tested team.
- Plano DWI Lawyer Plano DWI cases, prosecuted in McKinney by a county that will not reduce them to obstruction.
- Plano Criminal Defense Lawyer Plano arrests for assault, drugs, theft, and weapons, heard at the Steindam courts in McKinney.
Court guides for the counties this office covers: Collin County, Grayson County, McKinney, Plano, Frisco.
Wherever You Are in Your Case, Start Here
A DWI case has many moving parts. Find the question you are asking right now.
“I’m out of jail. Now what?”
What happens next, from booking through your first court date, and the deadline that comes first.
Booking to court date“Will I still be able to drive?”
A DWI arrest starts a second, separate case against your license, and it runs on a 15-day clock.
Save your license“What even counts as a DWI?”
What Texas actually has to prove, and the three elements every case rests on.
The three elements“What exactly am I charged with?”
Texas charges DWI at six levels, and four facts can turn a misdemeanor into a felony.
See the charge levels“How bad can the sentence get?”
What a first, second, or felony DWI carries in jail time, fines, and suspension.
Jail, fines, suspension“Is their evidence any good?”
Breath, blood, and roadside tests: what each measures and where each one goes wrong.
Where the tests fail“Was the stop even legal?”
What police need before the lights come on, what the roadside can and cannot require of you, and how to tell afterwards.
The 24 driving cues“What can be done about it?”
Every Texas DWI defense by category, from the stop through the elements the State still has to prove.
Every defense, by type“What happens next, and when?”
Every stage of a Texas DWI case, from filing through disposition, and what happens at each.
Walk through a case“How does my case end?”
Dismissal, acquittal, reduction, deferred, probation, or jail, and which endings let you clear your record.
See how cases end“What does this do to my life?”
What a DWI touches beyond the courtroom: your job, insurance, immigration status, and license.
What a conviction costs“Who should I hire, and what will it cost?”
What to ask, which credentials matter in a DWI case, what fees should cover, and the red flags.
Credentials and feesNot sure what a term means? Check the glossary.
The Rest of What We Defend
DWI is the majority of our work, not all of it. The same attorneys handle these charges in the same courthouses.
Criminal Defense
Assault, drugs, theft, weapons, and every other Texas charge, defended by the same trial team.
Criminal Defense in Collin CountyFederal Crimes
Federal court runs on different rules and different sentencing math. Federal cases from Collin County are filed in the Eastern District of Texas, Sherman Division.
Texas Federal CrimesFrisco DWI Questions, Answered
Charged with DWI in Frisco?
Two counties, two courthouses, one deadline. Free, confidential case review. Intake answers 24/7, and if we can take your case, the consultation with an attorney is free.
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