Controlled Substance Possession in Hays County — What the Charge Requires and Where the Defense Lives

Controlled substance possession in Texas requires the prosecution to prove three things: the identity of the substance, the weight, and that you knowingly possessed it. All three are legally required. All three are challengeable. The identity of the substance must be confirmed by a certified lab analyst using validated testing methodology. The weight determines the charge level and must be measured correctly. The knowledge and possession elements require the prosecution to connect you specifically to the substance beyond a reasonable doubt — which is harder to prove than most clients expect when the drugs were found in a shared vehicle, a common area, or somewhere that multiple people had access.

Penalty Group 1 — which includes cocaine, methamphetamine, heroin, fentanyl, and most prescription opioids — starts at a state jail felony for any amount under 1 gram and escalates through 1st degree felony at 200 grams or more. PG2 covers MDMA/ecstasy, PCP, and THC concentrate. PG3 covers prescription benzodiazepines and stimulants possessed without a valid prescription. PG4 covers certain limited-quantity codeine compounds. Each group has its own charge tier structure and its own set of defense issues around classification.

Prescription drug charges — where someone is found with Xanax, Adderall, hydrocodone, or oxycodone without their name on the bottle — are increasingly common in Hays County. These cases require the prosecution to prove the substance was in fact the controlled substance alleged and that possession was unauthorized. Valid prescription defenses, labeling issues, and identification challenges are all available. Call 737-937-5786 the moment of the arrest.

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Texas Drug Penalty Groups — Charges & Penalties

The penalty group is the prosecution’s first allegation. The quantity determines the charge level. Both must be proven beyond a reasonable doubt — and both are challengeable.

Penalty Group 1

Cocaine • Heroin • Methamphetamine • Fentanyl • Oxycodone • Hydrocodone

<1gState Jail Felony180 days–2 yrs

1–4g3rd Degree Felony2–10 yrs

4–200g2nd Degree Felony2–20 yrs

200–400g1st Degree Felony5–99 yrs

400g+Enhanced 1st Degree10–99 yrs

Penalty Group 2

MDMA • Psilocybin • PCP • THC Concentrate • Vape Cartridges • Wax • Edibles

<1gState Jail Felony180 days–2 yrs

1–4g3rd Degree Felony2–10 yrs

4–400g2nd Degree Felony2–20 yrs

400g+1st Degree Felony5–99 yrs

⚠ THC vape cartridges & edibles are PG 2, NOT marijuana

Penalty Group 3 & 4

PG 3: Xanax • Ritalin • Valium • Anabolic Steroids
PG 4: Compound preparations containing narcotics

<28g (PG3)Class A MisdemeanorUp to 1 year

28–200g3rd Degree Felony2–10 yrs

200–400g2nd Degree Felony2–20 yrs

Marijuana (Separate Statute)

Cannabis flower only — NOT THC concentrate or edibles

≤2 ozClass B MisdemeanorUp to 180 days

2–4 ozClass A MisdemeanorUp to 1 year

4 oz–5 lbsState Jail Felony180 days–2 yrs

5–50 lbs3rd Degree Felony2–10 yrs

Drug-free zone enhancements under §481.134 apply within 1,000 feet of schools and other protected locations. These must be specifically alleged and proven — and are specifically contestable.

Controlled substance possession defense San Marcos — penalty group analysis and chain of custody challenge Hays County

Three Defense Lines That Apply to Every Controlled Substance Case

The Fourth Amendment is always the first analysis. The stop, the search, the justification. If the officer lacked legal authority to search you or your vehicle, the controlled substance is suppressible. Without the substance, the prosecution has nothing. I pull the dashcam, bodycam, dispatch log, and the officer’s training record before anything else.

The lab and chain of custody is the second. The prosecution must prove the substance was what it claims it was, tested by a certified analyst using properly validated methods, with an unbroken documented chain from the evidence bag at the scene to the analyst’s bench in the lab. Lab analyst certification, testing equipment calibration records, documentation gaps in the chain, and analyst methodology are all subject to challenge. We request the full lab file — not just the summary report — on every controlled substance case.

Knowledge and constructive possession is the third. You must have known the substance was there and had control over it. In cases involving multiple vehicle occupants, shared residences, borrowed cars, and drugs found in common areas, the prosecution’s ability to prove you specifically knew about and controlled the substance is often where the case is most vulnerable. We challenge the connection between you and the substance when the facts support it.

Controlled substance defense attorneys San Marcos — Mark Hull and Allison Tisdale defending drug possession charges Hays County

How We Defend Controlled Substance Charges in Hays County

Three independent defense lines, pursued simultaneously from the first day.

01

Evaluate the stop and search under the Fourth Amendment

Every controlled substance case starts here. Was the traffic stop justified? Did the officer have probable cause, consent, or a recognized exception before searching? Was the scope of the search consistent with its legal basis? A successful suppression motion eliminates the evidence and ends the prosecution.

02

Request the complete lab file and challenge the analysis

We request every document related to the lab analysis: the chain of custody log, the analyst’s certification records, the instrument calibration logs, the test methodology documentation, and the analyst’s notes. Summary lab reports alone do not tell us whether the analysis was properly conducted. We find the problems in the complete record.

03

Challenge the weight and penalty group classification

The weight determines the charge level. We scrutinize the measurement methodology, whether the total weight included adulterants or cutting agents, whether the lab’s measurement actually places the substance in the charged tier, and whether the substance was correctly classified in the penalty group alleged.

04

Challenge constructive possession when the drugs were not on your person

If the substance was found in a vehicle you were in but didn’t own, in a room you shared with others, or in a bag that was not yours, the prosecution must prove you specifically knew about it and had control. We challenge every element of the constructive possession inference with the available evidence.

05

Evaluate prescription drug defenses

For PG3 charges involving Xanax, Adderall, hydrocodone, or similar substances, we evaluate whether a valid prescription existed, whether the substance was lawfully dispensed, and whether the prosecution can actually prove the substance found was the controlled substance alleged without valid authorization.

06

Engage DA Kelly Higgins’s office with documented suppression arguments

Allison Tisdale prosecuted drug cases before joining the defense. She knows how this office evaluates its suppression exposure and what documented Fourth Amendment arguments create real pressure toward dismissal. We go in with specific grounds, not general requests for consideration.

Controlled Substance Defense in Hays County — Former Prosecutor, 20+ Years Trial Work

Mark Hull has defended controlled substance possession cases — from state jail felony trace amounts through first-degree quantity charges — in Hays County courts for over 20 years. Suppression hearings and lab challenge arguments require the same evidentiary rigor as trial.

Allison Tisdale prosecuted controlled substance cases as a Texas state prosecutor before joining the defense. She knows exactly how DA Kelly Higgins’s office evaluates its drug files, what it considers a clean Fourth Amendment stop, and where the chain of custody documentation tends to have the most gaps. We carry a 5.0 rating across 363 Google reviews and have achieved Over 930 dismissals or rejected cases since 2021 across Central Texas courts, including PG1 felony drug cases dismissed on Fourth Amendment and lab grounds.

◆ Trial-Tested Criminal Defense

20+ years of Texas criminal defense experience. Hays, Travis, Williamson, and Caldwell county courts. Mark Hull.

◆ Former State Prosecutor on Staff

Allison Tisdale prosecuted criminal cases as a Texas state prosecutor. She knows how DA Kelly Higgins’s office builds drug cases — and where they fall apart.

◆ Tried Cases to Verdict in Hays County

When the evidence supports going to trial, we go. That changes how the prosecution values every negotiation at every prior stage.

◆ Over 930 dismissals or rejected cases since 2021

Hays County, Travis County, Williamson County — drug charges, DWI, assault, and felonies of every level.

Over 930dismissal or rejected cases since 2021

5.0Google Rating (363 Reviews)

20+Years in Hays County Courts

Controlled Substance FAQ — Hays County & San Marcos

Common questions about controlled substance possession charges in Texas — answered with specific statute citations and Hays County court details.

What is a Penalty Group 1 drug in Texas?+

Penalty Group 1 under Health & Safety Code §481.102 includes cocaine, methamphetamine, heroin, fentanyl, oxycodone, hydrocodone (in quantities greater than 300 dosage units), and most other Schedule I and II controlled substances. Possession of any PG1 substance in any amount is a felony in Texas — less than 1 gram is a state jail felony, and the charge escalates through third-degree, second-degree, and first-degree felony levels as the weight increases. There is no misdemeanor level for PG1 possession.

Can a controlled substance charge be dismissed in Hays County?+

Yes — and drug cases are frequently dismissed when the Fourth Amendment analysis is done correctly. A stop that lacked reasonable articulable suspicion or a search that lacked legal basis can result in suppression of the drug evidence, leaving the prosecution with nothing to proceed on. Chain of custody problems, lab certification failures, and constructive possession challenges also provide grounds for dismissal. We have achieved dismissals on PG1 felony drug cases in Hays County where the Fourth Amendment suppression argument was successful. Call 737-937-5786 immediately.

Can I be charged for having someone else’s prescription drugs?+

Yes. Possession of a controlled substance without a valid prescription in your name is a criminal offense in Texas. PG3 substances like Xanax, Valium, Adderall, and Ritalin are Schedule III or IV controlled substances. Being found with them without a prescription bearing your name can support a possession charge. The defense evaluates whether a valid prescription existed even if the drugs were in a different bottle, whether the prosecution can confirm the substance is the specific controlled substance alleged, and whether the possession was authorized under any exception.

What is the difference between Penalty Group 1 and Penalty Group 2?+

PG1 under §481.102 includes the most serious controlled substances: cocaine, methamphetamine, heroin, fentanyl, and most opioids. PG2 under §481.103 includes hallucinogens, ecstasy/MDMA, PCP, and THC concentrate. Both groups start at a state jail felony for less than 1 gram and escalate to first-degree felony at higher weights, though the specific tier thresholds differ between groups. The primary practical difference for defense is that PG1 charges are more common and the lab identification challenges differ by substance category.

Does the weight include the adulterants and cutting agents?+

Yes — under Texas law, the weight used to determine the charge level includes the controlled substance and any adulterants and dilutants mixed with it, under Health & Safety Code §481.002(49). This means the prosecution does not need to prove the weight of pure drug — it measures the total weight of the mixture. We scrutinize the lab’s measurement methodology nonetheless, because errors in weighing, including wet versus dry weight, inclusion of packaging, and instrument calibration, can affect whether the weight places the substance in the charged tier.

What is constructive possession of a controlled substance?+

Constructive possession means you had knowledge of the substance and exercised care, custody, control, or management over it, even if it was not physically on your person. Courts evaluate constructive possession based on proximity to the substance, access to the area where it was found, links connecting you to the substance (fingerprints, personal items nearby, incriminating statements), and any other evidence showing dominion and control. In cases where the drug was found in a shared vehicle or a common living area, constructive possession is the prosecution’s most contestable element.

Is fentanyl treated differently from other PG1 substances?+

Yes. In 2023, Texas added Penalty Group 1-B under Health & Safety Code §481.1022, which covers fentanyl and certain fentanyl-related compounds. The charge tiers for PG1-B are more aggressive than standard PG1 at lower weights: 2 grams or more is a minimum 3rd degree felony; 4 grams or more is a minimum 2nd degree felony. The defense analysis for fentanyl cases is the same as other PG1 charges: Fourth Amendment stop and search evaluation, lab identification and chain of custody challenge, and constructive possession analysis.

What should I do if I was arrested for controlled substance possession in San Marcos?+

Call 737-937-5786 immediately. Do not make any statements to law enforcement. Do not attempt to explain the substance, where it came from, or whether it belongs to someone else. Do not consent to any further searches. The Fourth Amendment analysis depends on what was documented about the stop — dashcam footage, bodycam footage, and the officer’s probable cause documentation all need to be preserved. The lab chain of custody begins the moment the evidence is collected. The earlier we are involved, the more completely we can evaluate every defense available on your specific case.

Drug Defense Resources — San Marcos & Hays County

Related pages covering drug charges and criminal defense in San Marcos and Hays County.

Drug Charges Hub

All drug charge types in Hays County — penalty groups, quantities, and defense overview.

Marijuana Possession

Hemp/marijuana field test challenges and marijuana weight-tier defense in Hays County.

Drug Trafficking

PG1 possession with intent to deliver — weight-enhanced charges and intent defense.

Drug Paraphernalia

Paraphernalia charges that frequently accompany controlled substance possession.

Criminal Defense San Marcos

Full criminal defense hub for all charge types in Hays County.

Expungement San Marcos

Clearing a dismissed controlled substance charge under Texas Chapter 55.

Probation Violations

Drug-related probation violations — MTR and MTTI defense in Hays County.

Jail Release

Bond and release after a drug arrest in San Marcos and Hays County.

What Our Clients Say

5.0 stars • 363 Google reviews from clients across Hays County, Travis County, and Central Texas.

RL

Ronnicka Lopez

★★★★★

Google

“After two years, the case was dismissed and dropped. They made this whole ordeal easy, kept me in the loop, told me exactly what to expect. Mrs. Allison is such an amazing and sweet lady — the whole team. I see exactly why they received multiple awards for best law firm in the state.”

BS

Blake Shires

★★★★★

Google

“My case was dismissed. Mr. Hull was patient, attentive, and consistently communicative from start to finish. He explained every step and made sure I felt supported throughout. I highly recommend Mark Hull and The Hull Firm.”

SH

Shawn Hallman

★★★★★

Google

“These attorneys were responsive, intelligent, and relentless. I appreciated how they always had a plan and stayed one step ahead. If you’re facing criminal charges, you want them on your side.”

737-937-5786

Controlled Substance Possession Defense in San Marcos & Hays County

Controlled Substance Possession in Hays County — What the Charge Requires and Where the Defense Lives

Texas Drug Penalty Groups — Charges & Penalties

Three Defense Lines That Apply to Every Controlled Substance Case

How We Defend Controlled Substance Charges in Hays County

Controlled Substance Defense in Hays County — Former Prosecutor, 20+ Years Trial Work

Controlled Substance FAQ — Hays County & San Marcos

Drug Defense Resources — San Marcos & Hays County

Drug Charges Hub

Marijuana Possession

Drug Trafficking

Drug Paraphernalia

Criminal Defense San Marcos

Expungement San Marcos

Probation Violations

Jail Release

What Our Clients Say

Controlled Substance Charge in San Marcos or Hays County? Call Us Now.

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