Prosper DWI and Criminal Defense Lawyers
Serving Clients Across North Texas Including Dallas, Fort Worth, Prosper, Denton, and Waco
Serving Prosper, Texas
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(972) 848-8828
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"Deandra Grant Law fights hard for their clients and is always willing to go above and beyond. They are the best firm for DWI cases in DFW and beyond. Definitely hire them to represent you in any pending cases."
- P. Williams

"Deandra Grant made a tough situation so much better. She listened to my concerns and helped me so much with my case. I would recommend her to anyone needing legal services."
- M. Haley

"Deandra Grant Law handled my case with diligence and professionalism. Deandra Grant's reputation is stellar and now I know why. She has a team of individuals who provide quality service."
- N. Coulter
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Collin County Criminal Courts Guide
By Attorney Deandra Grant
If you’re facing a criminal charge in Collin County, understanding how the local courts work can make the process far less confusing. This guide explains where cases are heard, what each court handles, and what you can expect as your case moves through the system.
Read NowProsper DWI and Criminal Defense Lawyers
Prosper is one of the fastest-growing communities in North Texas, straddling the Collin and Denton county lines along US-380 and the Dallas North Tollway. The Prosper Police Department enforces DWI and criminal laws along US-380, Dallas North Tollway, Coit Road, and Prosper Trail. Every criminal and DWI case arising from Prosper is prosecuted by the Collin County District Attorney’s office and heard at the Russell A. Steindam Courts Building.
Deandra Grant Law’s Allen office at 1333 W. McDermott Drive, Suite 180 which is minutes from the Collin County courthouse. For Denton County cases or our Denton office at 1317 E McKinney St, Suite 101A is directly across from the Denton County Courts Building.
Managing Partner Deandra Grant holds a Master’s Degree in Pharmaceutical Science, a Graduate Certificate in Forensic Toxicology, and the ACS-CHAL Forensic Lawyer-Scientist designation. Partner Douglas Huff holds the same ACS-CHAL designation and has completed advanced digital forensics training. For federal matters in the Northern District of Texas, Of Counsel James Lee Bright brings more than 25 years of federal trial experience.
Why the Science Behind Your Case Matters
Most defense attorneys challenge DWI and criminal evidence through legal argument. Deandra Grant Law challenges it through the science.
- Blood testing: Texas DPS Crime Lab in Garland for most Prosper DWI blood draws. GC-FID methodology, in vitro fermentation, sodium fluoride adequacy, chain of custody, analyst qualifications
- Drug cases: DPS Austin, Armstrong Forensic Laboratory, or NMS for drug analysis. Presence is not impairment.
- Breath testing: Intoxilyzer 9000. Partition ratio variability (1,100:1 to 3,400:1), 15-minute observation period compliance, calibration records, mouth alcohol, GERD/diabetes effects.
- Field sobriety tests: Deandra Grant is a trained SFST instructor who administers and grades the ACS-CHAL Forensic Lawyer-Scientist and DUIDLA Board Certification exams. SFST cross-examination goes to the protocol, not just the result.
- Digital evidence: Cell phone data, social media, CDR records, surveillance footage
- Retrograde extrapolation: Rising BAC defense, Widmark formula, individual elimination rate variability
Collin County Courts and Enforcement
Courthouse: Russell A. Steindam Courts Building, 2100 Bloomdale Rd., McKinney, TX 75071 (Collin County cases); Denton County Courts Building, 1450 E McKinney St., Denton, TX 76209 (Denton County cases).
District Attorney: Most Prosper falls within Collin County, prosecuted by the Collin County DA’s office. Cases from the Denton County portion are prosecuted by the Denton County DA’s office.
Federal cases: Both Collin and Denton counties are in the Eastern District of Texas. Attorney James Lee Bright handles federal defense in the Eastern District.
Enforcement in Prosper
- Prosper Police Department
- Collin County Sheriff’s Office / Denton County Sheriff’s Office (depending on location)
- Texas DPS Troopers (US-380, Dallas North Tollway)
DWI Penalties in Texas
- First offense (Class B): Up to 180 days jail, fine up to $2,000, license suspension up to 1 year. Deferred adjudication may be available in some first-time cases — eligibility is fact-specific.
- BAC 0.15+ (Class A): Up to 1 year jail, fine up to $4,000, mandatory ignition interlock. Permanent conviction.
- Second offense (Class A): 72-hour minimum jail as COP, up to 1 year, fine up to $4,000, mandatory interlock.
- Third offense (felony): 2–10 years prison, fine up to $10,000, 10-day minimum jail as COP.
- DWI with child passenger: State jail felony, 180 days–2 years, fine up to $10,000.
- Intoxication assault: Third-degree felony, 2–10 years, fine up to $10,000.
- Intoxication manslaughter: Second-degree felony, 2–20 years. Bentley’s Law restitution applies if victim was a parent of minor children.
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Steps to take after a drug crime arrest
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Consequences of marijuana possession
How long does a criminal defense case take?
Criminal Defense in Collin County
Every criminal defense in Collin County begins with Texas Code of Criminal Procedure Article 38.23 which is the exclusionary rule with no good faith exception. An unlawful stop, a defective warrant, a search beyond its scope: any of these suppresses the evidence driving the prosecution’s case.
We handle the full range of criminal charges arising from Prosper and Collin County:
- Assault and family violence — including the permanent consequences of the family violence affirmative finding
- Drug possession and delivery — lab analysis challenged at the chemistry level
- Theft, robbery, fraud, and white-collar offenses
- Gun crimes — UCW, felon in possession, federal firearms charges
- Sex offenses — forensic evidence and digital evidence examined independently
- Murder and homicide — through capital murder
- Federal criminal defense — Eastern District of Texas, handled by James Lee Bright
Frequently Asked Questions After an Arrest in Prosper, TX
Because Prosper straddles the Collin and Denton county lines, the court that handles your case depends on where within the city the arrest occurred. Collin County cases are prosecuted in McKinney, while Denton County cases proceed through courts in Denton. Each system has its own procedures, prosecutors, and timelines, which is why familiarity with both is important when building your defense.
Yes. Law enforcement in Prosper concentrates patrol activity along major corridors including Preston Road, US-380, and the Dallas North Tollway, particularly during evening and late-night hours. Traffic stops in these areas frequently lead to DWI investigations. The circumstances of the stop itself — including whether the officer had lawful justification — are always among the first things we examine.
Yes. Texas law does not require a BAC at or above 0.08% to support a DWI charge. Prosecutors can pursue a conviction based solely on evidence that a person lost the normal use of their mental or physical faculties, regardless of the measured alcohol level. This makes the facts surrounding the stop, the officer’s observations, and any field sobriety testing particularly important in your defense.
An Administrative License Revocation (ALR) hearing is a separate civil proceeding that determines whether your driver’s license will be suspended following a DWI arrest. You have only 15 days from the date of arrest to request this hearing. Missing that window results in automatic suspension. Requesting the hearing promptly also creates an early opportunity to examine the arresting officer’s testimony and gather information useful to your criminal defense.
It can. Many employers conduct background checks, and certain professional licenses — including those in healthcare, law, education, and commercial driving — carry reporting requirements or disciplinary consequences tied to criminal convictions. The impact varies by profession and licensing board, but it is an important consideration when evaluating defense options and potential resolutions.
Misdemeanors are less serious offenses handled in county courts and carry penalties including fines, probation, and up to one year in a county jail. Felonies are more serious charges handled in district court and can result in state prison sentences ranging from 180 days to life depending on the degree. The classification of a charge significantly affects the potential consequences and the court process your case will go through.
Yes. Our firm handles a full range of criminal defense matters in Prosper, including drug possession, assault, theft, and felony charges. Many of the same issues that arise in DWI cases — unlawful stops, improper searches, chain of custody problems, and constitutional violations — are equally relevant in drug and criminal cases. Each situation receives the same thorough review.
Yes. Prosper cases move through either Collin County courts in McKinney or Denton County courts in Denton depending on where the arrest occurred. Each court has its own judges, prosecutors, and procedures. Familiarity with how those systems operate is a meaningful part of building an effective defense strategy.
Many criminal cases, including assault and theft matters, are resolved before trial through negotiation, deferred adjudication, or pretrial diversion programs. Whether those options are available depends on the specific charge, your criminal history, and the county handling the case. We assess those possibilities early so you have a clear picture of the paths forward.
In some circumstances, yes. The viability of a reduction depends on the facts of the case, the charging county’s policies, and the specific legal issues identified during the defense review. While no outcome can ever be guaranteed, thorough investigation and strategic negotiation have produced favorable resolutions for many clients whose cases initially appeared straightforward to prosecutors.
A probation violation can result in a hearing before the judge, and if the violation is found to have occurred, the court has broad discretion in its response — including revoking probation and imposing the original jail or prison sentence. How that hearing is handled and what is presented on your behalf matters significantly to the outcome.
Timelines vary widely depending on charge severity, the volume of evidence, and whether the case resolves through negotiation or proceeds to trial. Misdemeanor cases may resolve in a matter of months, while felony matters often take considerably longer. We keep clients informed throughout the process so there are no surprises about what to expect at each stage.
Bringing any documentation you have received — including arrest paperwork, bond conditions, and any notices from the Texas Department of Public Safety — gives us the most complete picture from the start. If you do not have those documents yet, that is fine. A consultation can still cover what you remember about the arrest, your background, and the questions that matter most to you right now.
Why Choose Deandra Grant Law in Prosper
- Allen office minutes from the Collin County courthouse. 1333 W. McDermott Drive, Suite 180.
- 30+ years in Collin County courts. 500+ trials to verdict statewide
- ACS-CHAL Forensic Lawyer-Scientist — both Deandra Grant and Douglas Huff.
- Master’s Degree in Pharmaceutical Science + Graduate Certificate in Forensic Toxicology. Science-based challenges to blood, breath, and drug evidence that go beyond legal argument.
- Trained SFST Instructor.
- 17 published law books. Including The Texas DWI Manual.
- Texas Super Lawyer since 2011. AV® Preeminent rated by Martindale-Hubbell®.
- Federal defense. James Lee Bright — Eastern District of Texas.
Recent Blogs
If you have been arrested for DWI or are facing criminal charges in Prosper or anywhere in Collin County, call (214) 225-7117 for a free, confidential consultation. Or schedule online at texasdwisite.com. The 15-day ALR deadline may already be running.
Client Reviews
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“Deandra Grant Law – Criminal & DWI Defense handled my case with diligence and professionalism. Deandra Grant’s reputation is stellar and now I know why. She has a team of individuals who provide quality service.”
N. Coulter

(214) 225-7117
Experienced DWI Defense
