Drug Charges Defense San Antonio

Q: I was arrested for drugs after a traffic stop in San Antonio. What do I do?

Call 210-899-0732 immediately. Do not make any statements to SAPD or DPS about the drugs, who they belong to, or where they came from. Do not consent to any additional searches. Write down everything you remember about the stop: the exact location, what the officer said your traffic violation was, whether a K-9 was deployed, and whether you were asked for consent. The Fourth Amendment analysis begins with the specific facts of the stop. Call us before anything else.

Q: Can a drug charge from an IH-35 or IH-10 stop be dismissed?

Yes — and the stop is the first thing we evaluate on every Bexar County drug case. Under the Fourth Amendment and Texas Code of Criminal Procedure Art. 38.23, evidence from an unconstitutional stop or unlawful extension is suppressible regardless of what was found. Under Rodriguez v. United States, the stop cannot be extended past the traffic purpose without independent reasonable suspicion. If the extension was not legally justified, the drugs found during the search are suppressible and

Q: Can a K-9 alert be challenged in Bexar County courts?

Yes. Under Florida v. Harris (2013), courts evaluate K-9 training records, certification history, and field performance including false alert rates. We request all of this through open records. A dog with a high false alert rate, an expired certification, or a handler with documented cueing issues has questionable reliability. We also raise the hemp defense: a K-9 cannot distinguish hemp from marijuana, and an alert followed by a substance that has not been confirmed as exceeding 0.3% THC by GC-

Q: What happens if I was just a passenger when drugs were found?

The prosecution must prove you specifically knew about the controlled substance and had control over it — not just that you were in the vehicle. Being a passenger is not the same as possession. The prosecution must establish affirmative links connecting you to the substance: your proximity, your access, your statements, fingerprints. In multi-occupant vehicle cases, the constructive possession argument is often the prosecution’s weakest point. We challenge it specifically on every ap

Q: What is the federal threshold on IH-35 drug arrests in San Antonio?

Federal drug trafficking under 21 U.S.C. §841 applies at specific quantity thresholds. For cocaine: 500 grams triggers a 5-year mandatory minimum; 5 kilograms triggers a 10-year minimum. For methamphetamine (actual/pure): 5 grams triggers a 5-year minimum; 50 grams triggers 10 years. Heroin: 100 grams for 5 years; 1 kilogram for 10 years. These are mandatory — the judge cannot go below them. IH-35 through Bexar County generates federal drug prosecutions from DPS interdiction stops reg

Drug Charges in Bexar County — The Charge Depends on What It Is, How Much, and How It Was Found

Texas drug charges under Health & Safety Code Chapter 481 are determined by the penalty group and the weight. PG1 — cocaine, methamphetamine, heroin, fentanyl — starts at a state jail felony for any amount under 1 gram. PG2 — MDMA, THC concentrate, vape cartridges — carries the same felony structure for any amount. PG3 covers prescription benzodiazepines and stimulants without authorization. Marijuana operates under a separate statute but escalates from Class B misdemeanor to first-degree felony based on weight. Every charge level requires the prosecution to prove both the substance identity and the weight beyond a reasonable doubt.

Before any of that matters, I look at how the evidence was obtained. IH-35 through Bexar County runs north through the city and connects to IH-10 West toward El Paso — one of the most active drug interdiction stretches in South Texas. DPS Criminal Interdiction Unit Troopers, the Bexar County Sheriff, and SAPD all run enforcement on these corridors. A traffic stop that lacks legal justification, a K-9 deployment that extended the stop past its lawful purpose, or a consent search obtained under coercive circumstances can all support suppression of the drug evidence. If evidence is suppressed, the effect depends on the importance of that evidence, what other admissible evidence remains, and the procedural posture of the case. Suppression can materially weaken the prosecution’s case, but it does not automatically require dismissal.

Allison Tisdale prosecuted drug cases as a Texas state prosecutor before joining our firm. She knows how DA Joe Gonzales’s Narcotics unit evaluates its files, what it considers a clean stop versus one with Fourth Amendment exposure, and what documented suppression arguments create real pressure toward dismissal. Call 210-899-0732 immediately after a drug arrest in Bexar County.

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Drug Charges Defense — All Sub-Pages

Each charge type has a different legal structure, different penalty range, and different defense angles. Select the charge that applies to your case.

Class B Misd. → 1st Degree Felony

Marijuana Possession

Hemp vs. marijuana field test challenges, weight-tier defense, and Fourth Amendment stop analysis. The most common drug charge in Bexar County — and one of the most defensible when the stop is examined.

Marijuana Defense → State Jail Felony → 1st Degree Felony

Controlled Substance Possession

PG1 through PG4 — cocaine, meth, heroin, MDMA, prescription drugs. Fourth Amendment stop, lab chain of custody, and constructive possession challenges.

Controlled Substance Defense → 2nd Degree → 1st Degree Felony + Federal

Drug Trafficking & Delivery

Intent to deliver inferred from packaging, quantity, and cash. IH-35 and IH-10 border corridor arrests with parallel federal exposure under 21 U.S.C. §841.

Drug Trafficking Defense → Class C Misd. → State Jail Felony

Drug Paraphernalia

Section 481.125 — “used or intended to be used” standard, vape pen hemp defense, and multi-charge coordination. Even a Class C conviction is permanent.

Paraphernalia Defense → IH-35 & IH-10 Border Corridor — All Charge Levels

IH-35 & IH-10 Drug Charges Defense

San Antonio sits at the IH-35/IH-10 junction. IH-35 connects directly to Laredo and the US-Mexico border. DEA, DPS CIU, HSI, BCSO, and SAPD all operate on these routes. Stop extension under Rodriguez, K-9 alert challenges, and federal threshold exposure evaluated on every case.

IH-35 & IH-10 Drug Defense →

Texas Drug Penalty Groups — Bexar County 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.

San Antonio drug charges defense — IH-35 and IH-10 drug stop challenge Fourth Amendment Bexar County courts

IH-35 & IH-10 Drug Interdiction in Bexar County — How the Stops Work and How They’re Challenged

IH-35 runs north-south through San Antonio connecting to Laredo and the US-Mexico border — making it one of the highest-volume drug interdiction corridors in the country. IH-10 runs east-west through Bexar County connecting to El Paso. DPS Criminal Interdiction Unit Troopers run targeted traffic enforcement on both interstates specifically designed to identify drug trafficking indicators. These are not random traffic stops — they are structured interdiction operations.

The template for an IH-35 or IH-10 drug arrest in Bexar County follows a specific pattern: a minor traffic violation provides the initial legal basis for the stop. Once stopped, the officer begins observing interdiction indicators — travel patterns inconsistent with stated destination, conflicting accounts between driver and passenger, odor masking, rental vehicles, out-of-state plates. If the officer decides to extend the stop past its original purpose, a K-9 is deployed or consent is requested.

Under Rodriguez v. United States (575 U.S. 348, 2015), a traffic stop cannot be extended past the time needed to complete the traffic purpose without independent reasonable suspicion of criminal activity. The interdiction indicators alone do not automatically constitute reasonable suspicion. We challenge the extension of every Bexar County drug stop where the timeline shows the officer’s drug investigation began before any independent criminal activity was observed.

San Antonio drug defense attorneys Mark Hull and Allison Tisdale — defending drug charges in Bexar County courts

How We Defend Drug Charges in Bexar County

Three independent defense lines pursued simultaneously from day one.

01

Evaluate the stop and extension under the Fourth Amendment

Was the initial traffic violation legally sufficient? Was the stop extended past its lawful purpose? Did the officer have independent reasonable suspicion before deploying a K-9 or requesting consent? A successful suppression motion ends the drug case regardless of what was found.

02

Challenge the K-9 alert and certification

We request the dog’s training records, certification history, and field performance data including false alert rates. A K-9 with an undisclosed poor false alert rate, an expired certification, or a handler with documented cueing patterns has questionable reliability under Florida v. Harris. We also raise the hemp challenge: a dog cannot distinguish hemp from marijuana, and a K-9 alert without GC-MS lab confirmation does not prove illegal marijuana.

03

Challenge the lab identification and chain of custody

The substance must be confirmed by a certified analyst using validated methodology with an unbroken chain of custody from collection to testimony. We request the complete lab file and examine every link from the evidence bag at the scene to the analyst’s bench in the lab.

04

Challenge constructive possession in multi-occupant stops

If the drugs were found in a vehicle or location with multiple people, the prosecution must prove you specifically knew about the substance and had control. In shared vehicle cases, the connection between the drugs and any specific person is often the prosecution’s weakest argument.

05

Evaluate federal exposure on large-quantity arrests

For Bexar County IH-35 and IH-10 arrests involving quantities at or near federal threshold levels, parallel DEA investigation and federal prosecution under 21 U.S.C. §841 are real possibilities. Federal mandatory minimums begin at 5 years and cannot be reduced below the statutory floor. We evaluate federal exposure from the first consultation on every large-quantity arrest.

06

Engage DA Gonzales’s Narcotics unit with documented arguments

Allison Tisdale prosecuted drug cases in Texas courts before joining the defense. She knows how this office evaluates its suppression exposure, what it considers a clean stop, and what documented Fourth Amendment arguments move cases toward dismissal or significant charge reduction.

Drug Defense in Bexar County | Trial-Tested Defense, Former Prosecutor on Staff

Mark Hull has 20+ years of Texas criminal defense experience and has defended drug charges — from Class B marijuana misdemeanors through first-degree PG1 felonies — in the Bexar County Courts at Law and District Courts for over 20 years. Drug suppression hearings require the same evidentiary preparation as trial.

Allison Tisdale prosecuted drug cases as a Texas state prosecutor before joining the defense. She knows how DA Joe Gonzales’s Narcotics unit evaluates IH-35 and IH-10 corridor drug files, what evidence it considers sufficient, and where documented suppression arguments have the most leverage. The firm has secured over 960 dismissals or rejected cases since 2021.

◆ Trial-Tested Criminal Defense

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

◆ Former Prosecutor on Staff

Mark Hull brings more than 20 years of criminal defense experience. Allison Tisdale is a former Travis County DWI prosecutor whose prosecutorial experience provides firsthand perspective on how criminal cases are evaluated and prepared.

◆ Regular Appearances in Bexar County Courts

Cadena-Reeves Justice Center — Bexar County Courts at Law and District Courts. The firm’s attorneys regularly practice in these courts and are familiar with local procedures, court scheduling, and prosecuting offices.

◆ 960+ dismissals or rejected cases since 2021

Bexar County, Hays County, Travis County, Williamson County, and surrounding Central Texas courts.

960+dismissals or rejected cases since 2021

5.0Google Rating

20+Years in Bexar County Courts

Drug Charges FAQ — San Antonio & Bexar County

Common questions about drug charges in Bexar County courts.

I was arrested for drugs after a traffic stop in San Antonio. What do I do?+

Call 210-899-0732 immediately. Do not make any statements to SAPD or DPS about the drugs, who they belong to, or where they came from. Do not consent to any additional searches. Write down everything you remember about the stop: the exact location, what the officer said your traffic violation was, whether a K-9 was deployed, and whether you were asked for consent. The Fourth Amendment analysis begins with the specific facts of the stop. Call us before anything else.

Can a drug charge from an IH-35 or IH-10 stop be dismissed?+

Yes — and the stop is the first thing we evaluate on every Bexar County drug case. Under the Fourth Amendment and Texas Code of Criminal Procedure Art. 38.23, evidence from an unconstitutional stop or unlawful extension is suppressible regardless of what was found. Under Rodriguez v. United States, the stop cannot be extended past the traffic purpose without independent reasonable suspicion. If the extension was not legally justified, the drugs found during the search are suppressible and the prosecution has nothing.

Can a K-9 alert be challenged in Bexar County courts?+

Yes. Under Florida v. Harris (2013), courts evaluate K-9 training records, certification history, and field performance including false alert rates. We request all of this through open records. A dog with a high false alert rate, an expired certification, or a handler with documented cueing issues has questionable reliability. We also raise the hemp defense: a K-9 cannot distinguish hemp from marijuana, and an alert followed by a substance that has not been confirmed as exceeding 0.3% THC by GC-MS laboratory analysis does not prove illegal marijuana possession.

What happens if I was just a passenger when drugs were found?+

The prosecution must prove you specifically knew about the controlled substance and had control over it — not just that you were in the vehicle. Being a passenger is not the same as possession. The prosecution must establish affirmative links connecting you to the substance: your proximity, your access, your statements, fingerprints. In multi-occupant vehicle cases, the constructive possession argument is often the prosecution’s weakest point. We challenge it specifically on every applicable Bexar County drug case.

What is the federal threshold on IH-35 drug arrests in San Antonio?+

Federal drug trafficking under 21 U.S.C. §841 applies at specific quantity thresholds. For cocaine: 500 grams triggers a 5-year mandatory minimum; 5 kilograms triggers a 10-year minimum. For methamphetamine (actual/pure): 5 grams triggers a 5-year minimum; 50 grams triggers 10 years. Heroin: 100 grams for 5 years; 1 kilogram for 10 years. These are mandatory — the judge cannot go below them. IH-35 through Bexar County generates federal drug prosecutions from DPS interdiction stops regularly. We evaluate federal exposure from the first consultation on every large-quantity case.

Drug Defense Resources — San Antonio & Bexar County

Related pages covering drug charges and criminal defense in San Antonio and Bexar County.

Drug Charges Hub

All drug charge types in Bexar County — penalty groups, quantities, and Fourth Amendment defense.

Marijuana Possession

Hemp vs. marijuana field test challenges and weight-tier defense in Bexar County.

Controlled Substance

PG1–PG4 possession — lab chain of custody and constructive possession challenges.

Drug Trafficking

Intent to deliver challenges and federal threshold exposure on IH-35 and IH-10 arrests.

Drug Paraphernalia

Section 481.125 — paraphernalia definition challenges in Bexar County.

IH-35 & IH-10 Drug Charges

IH-35/IH-10 stop extension, K-9 alerts, and interdiction defense in Bexar County.

Criminal Defense Hub

Full criminal defense hub for all charge types in Bexar County courts.

Expungement San Antonio

Clearing a dismissed drug charge permanently under Texas Chapter 55.

What Our Clients Say

Read reviews from clients across Bexar County, 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.”

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210-899-0732

Drug Charges Defense Lawyer San Antonio — Bexar County

Drug Charges in Bexar County — The Charge Depends on What It Is, How Much, and How It Was Found

Drug Charges Defense — All Sub-Pages

Marijuana Possession

Controlled Substance Possession

Drug Trafficking & Delivery

Drug Paraphernalia

IH-35 & IH-10 Drug Charges Defense

Texas Drug Penalty Groups — Bexar County Charges & Penalties

IH-35 & IH-10 Drug Interdiction in Bexar County — How the Stops Work and How They’re Challenged

How We Defend Drug Charges in Bexar County

Drug Defense in Bexar County | Trial-Tested Defense, Former Prosecutor on Staff

Drug Charges FAQ — San Antonio & Bexar County

Drug Defense Resources — San Antonio & Bexar County

Drug Charges Hub

Marijuana Possession

Controlled Substance

Drug Trafficking

Drug Paraphernalia

IH-35 & IH-10 Drug Charges

Criminal Defense Hub

Expungement San Antonio

What Our Clients Say

Drug Charge in San Antonio or Bexar County? The Stop May Not Have Been Legal.

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