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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 NowMcKinney Drug Crime Lawyers
Drug charges in Collin County are prosecuted by the Collin County District Attorney’s Office and heard in the District Courts at the Collin County Courthouse, 2100 Bloomdale Road, McKinney, TX 75071. Drug specimens seized in Collin County cases are typically submitted to the DPS Crime Lab in Garland for identification and quantification. The laboratory analysis, the weight determination, and the chain of custody from seizure through testing are all subject to independent examination.
Deandra Grant Law has defended drug charges in Collin County for more than 30 years, with an office in Allen. Managing Partner Deandra Grant holds the ACS-CHAL Forensic Lawyer-Scientist designation, a Master of Science in Pharmaceutical Science, and a Graduate Certificate in Forensic Toxicology. Partner Douglas Huff holds the same ACS-CHAL designation. Every drug case at Deandra Grant Law begins with an independent review of the forensic evidence at the chemistry level.
Drug Charges in Collin County
Texas drug penalties are determined by the controlled substance’s penalty group classification and the quantity involved. Most drug charges are felony offenses. The specific charge, the applicable penalty range, and the defense strategy each depend on the substance, the weight alleged, and how the evidence was obtained.
Cocaine. A Penalty Group 1 controlled substance. Possession of one gram is a second-degree felony. Possession of four grams is a first-degree felony.
Methamphetamine. A Penalty Group 1 controlled substance subject to the same penalty structure as cocaine, with an additional forensic issue: standard field tests and immunoassay screens do not distinguish illegal d-methamphetamine from l-methamphetamine, the active ingredient in legal OTC products.
Heroin and Fentanyl. Penalty Group 1 controlled substances. Fentanyl is active at microgram quantities, making the laboratory’s weight determination and quantification methodology particularly critical defense considerations in every case.
Marijuana. Possession of two ounces or less is a Class B misdemeanor. Possession of more than four ounces is a felony. Delivery and distribution charges carry significantly elevated penalties above the possession tier.
Prescription Drugs. Possession without a valid prescription, fraudulent prescription offenses, and doctor shopping are actively prosecuted in Collin County. The penalty range depends on which penalty group the substance falls under and the quantity involved.
Drug Delivery and Distribution. Charged under a separate delivery penalty structure that carries higher penalties than possession at every weight tier. Drug-free zone enhancements (offenses occurring within 1,000 feet of a school or school bus) restrict probation eligibility and increase mandatory minimums under Texas Health and Safety Code §481.134.
Drug Manufacturing. Manufacturing or cultivating a controlled substance is a felony regardless of quantity. In methamphetamine cases, law enforcement also pursues charges based on NPLEx precursor purchase records.
McKinney Criminal & DWI Defense
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The Forensic Defense in Collin County Drug Cases
Article 38.23. Texas’s exclusionary rule carries no good faith exception. Collin County drug cases most commonly arise from traffic stops, confidential informant tips, and search warrants. The legality of the stop, the sufficiency of the warrant affidavit, and the reliability of any CI are examined before any other defense strategy is built.
Weight determinations. The penalty tier is driven entirely by weight. At threshold values (1 gram, 4 grams, 200 grams, 400 grams) the margin of error of the measuring instrument is a legitimate forensic challenge. Whether the DPS lab correctly isolated the controlled substance from adulterants, cutting agents, and packaging is subject to independent expert review.
Laboratory methodology and accreditation. Deviations in instrument calibration, analyst qualifications, sample handling, or chain of custody at the DPS Garland lab can render results inadmissible or subject to effective challenge at trial.
Field test reliability. Presumptive field tests are not definitive and are known to produce false positives across a range of substances. The confirmatory laboratory analysis (its methodology, the instrument used, and the analyst’s qualifications) is examined in every case.
Collin County drug court. Collin County has drug court programs for qualifying defendants, and diversion options may be available in some first-offense cases. Whether diversion is appropriate requires evaluating the specific charge, the defendant’s history, and the strength of the forensic evidence.
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Why Deandra Grant Law for McKinney Drug Defense
- ACS-CHAL Forensic Lawyer-Scientist — Deandra Grant and Douglas Huff. Laboratory methodology, weight calculation, chain of custody, and substance identification challenged at the chemistry level.
- Master of Science in Pharmaceutical Science + Graduate Certificate in Forensic Toxicology. The forensic science underlying every stage of the State’s drug evidence.
- Office in Allen. 30+ years in Collin County courts. 500+ trials to verdict. The Collin County Courts and the Collin County DA’s office are familiar ground.
- Federal defense capability. James Lee Bright handles federal drug charges in the Eastern District of Texas.
- Digital forensics training — Douglas Huff. Digital evidence, cell phone data, and surveillance footage evaluated at the technical level.
- 17 published law books. Including Arrested for Drug Charges in Texas
- Texas Super Lawyer since 2011. AV® Preeminent rated by Martindale-Hubbell®.
If you are facing drug charges in Collin County, call (214) 225-7117 for a free, confidential consultation. Or schedule online at texasdwisite.com.
Client Reviews
“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