Texas Heroin and Opioid Charges Defense Attorney

A heroin or opioid arrest in Texas can create serious felony exposure even when the amount involved is small. But the seriousness of the accusation does not change what the State must prove.

Police may find a substance in a vehicle, home, hotel room, pocket, bag, or prescription bottle. Investigators may allege possession, delivery, possession with intent to deliver, or involvement in an overdose. In some cases, what police initially believe is heroin may later test as fentanyl, another opioid, or a mixture containing several substances.

Those differences matter under Texas law.

I defend people facing heroin and opioid charges throughout Texas. My job is to determine what substance is actually involved, how Texas classifies it, who allegedly possessed or delivered it, whether the search was lawful, how the substance was tested, and whether the evidence supports the charge prosecutors are pursuing.

An arrest is not a conviction. The first step is understanding exactly what the State is accusing you of.

How Does Texas Classify Heroin?

Heroin is a Penalty Group 1 controlled substance under Texas Health and Safety Code Section 481.102. Penalty Group 1 also includes other opiates and controlled substances such as methadone, oxycodone, methamphetamine, and cocaine.

That classification is important because possession of less than one gram of heroin can generally be charged as a state jail felony.

Texas measures many Penalty Group 1 offenses using aggregate weight, including adulterants and dilutants. This means the alleged weight may include the entire qualifying mixture rather than only the chemically pure amount of heroin.

Are All Opioids Treated the Same Way in Texas?

No.

“Opioid” is a broad term describing a category of drugs. It is not one Texas criminal penalty group.

Different opioids may be classified differently.

For example:

• Heroin is in Penalty Group 1.
• Oxycodone is in Penalty Group 1.
• Methadone is in Penalty Group 1.
• Fentanyl and listed fentanyl derivatives are in Penalty Group 1-B.
• Certain codeine or hydrocodone formulations may fall into other penalty groups depending on their composition and concentration.

Texas specifically created Penalty Group 1-B for fentanyl and listed fentanyl derivatives. Fentanyl delivery charges are also governed by a separate statute with different punishment provisions.

That is why identifying the actual substance is one of the most important steps in an opioid case.

If the allegation specifically involves fentanyl, see our Texas Fentanyl Charges Defense page.

If the allegation involves oxycodone, hydrocodone, codeine, or another prescription medication, see our Texas Prescription Drug Charges Defense page.

What Does the State Have to Prove in a Heroin Possession Case?

Texas Health and Safety Code Section 481.115 generally requires the State to prove that a person knowingly or intentionally possessed a Penalty Group 1 or Penalty Group 1-B controlled substance without lawful authorization.

The words knowingly and intentionally matter.

Finding heroin near someone does not automatically prove that person knowingly possessed it.

The issue can become especially important when drugs are allegedly found:

• Under a seat in a vehicle
• In a shared apartment
• In a hotel room
• Inside someone else’s backpack
• In a common area of a house
• Inside borrowed luggage
• In a vehicle used by several people
• In a container accessible to multiple occupants

Texas drug prosecutions can involve actual possession or constructive possession.

Actual possession usually involves drugs allegedly found directly on a person.

Constructive possession generally involves an allegation that the person exercised care, custody, control, or management over drugs that were not physically on the person’s body.

When several people had access to the location, the connection between the accused and the substance may become a major issue.

What Are the Penalties for Heroin Possession in Texas?

Heroin possession is generally punished under Section 481.115 because heroin is a Penalty Group 1 substance.

Alleged Amount	General Offense Level
Less than 1 gram	State jail felony
1 gram to less than 4 grams	Third degree felony
4 grams to less than 200 grams	Second degree felony
200 grams to less than 400 grams	First degree felony
400 grams or more	Enhanced first degree felony punishment

For possession of 400 grams or more, Section 481.115 provides for life imprisonment or a term of 10 to 99 years and a fine of up to $100,000.

These are statutory punishment ranges, not predictions about what will happen in a particular case.

Criminal history, enhancements, drug-free zone allegations, and other circumstances may also affect potential punishment.

How Is Heroin Weight Calculated?

Texas generally uses aggregate weight, including adulterants and dilutants, when determining the offense level for Penalty Group 1 possession.

This can be particularly important in heroin cases because street drugs may contain other substances.

The prosecution may rely on the weight of the qualifying mixture rather than attempting to determine how much chemically pure heroin was present.

That makes questions about laboratory testing and weighing important.

The defense may need to examine:

• What substance was tested
• How many packages were tested
• Whether multiple substances were mixed together
• How the evidence was weighed
• Whether packaging was excluded
• Whether samples were combined
• Whether contamination was possible
• Whether the reported weight is near a charging threshold

A difference of even a small amount can matter when the reported weight falls close to the line between two felony levels.

What If Police Say the Substance Was Heroin but It Contained Fentanyl?

Laboratory testing becomes especially important.

A powder sold or represented as heroin may contain fentanyl, heroin, another controlled substance, or some combination of substances.

Texas places heroin in Penalty Group 1 but fentanyl and listed fentanyl derivatives in Penalty Group 1-B.

For simple possession, Section 481.115 covers both Penalty Group 1 and Penalty Group 1-B substances using the same basic weight thresholds.

Delivery is different.

Heroin manufacturing, delivery, and possession with intent to deliver are generally governed by Section 481.112. Fentanyl manufacturing, delivery, and possession with intent to deliver are governed by Section 481.1123, which carries different and sometimes significantly more severe punishment.

The laboratory result can therefore change much more than the name appearing in a police report.

What Is Possession With Intent to Deliver Heroin?

Texas Health and Safety Code Section 481.112 prohibits knowingly manufacturing, delivering, or possessing with intent to deliver a Penalty Group 1 controlled substance such as heroin.

Prosecutors do not necessarily need to prove that an actual sale occurred to pursue possession with intent to deliver.

They may try to infer intent from circumstances such as:

• Quantity
• Multiple packages
• Small individual bags
• Digital scales
• Cash
• Packaging materials
• Text messages
• Social media messages
• Payment records
• Controlled purchases
• Surveillance
• Confidential informants
• Statements made to police
• Evidence of alleged prior transactions

None of those factors should automatically be treated as proof of intent.

Each piece of evidence should be examined in context.

What Are the Penalties for Delivering Heroin or Possessing It With Intent to Deliver?

Heroin delivery and possession with intent to deliver are generally governed by Texas Health and Safety Code Section 481.112. Because heroin is a Penalty Group 1 substance, the potential punishment depends heavily on the aggregate weight of the substance, including adulterants or dilutants.

Alleged Amount	General Offense or Punishment
Less than 1 gram	State jail felony
1 gram to less than 4 grams	Second degree felony
4 grams to less than 200 grams	First degree felony
200 grams to less than 400 grams	Life or 10 to 99 years, plus a fine of up to $100,000
400 grams or more	Life or 15 to 99 years, plus a fine of up to $250,000

The distinction between possession and intent to deliver can have a major effect.

For example, possession of 1 gram to less than 4 grams of heroin is generally a third degree felony. Possessing the same amount with intent to deliver is generally a second degree felony.

At higher weights, Section 481.112 establishes its own punishment ranges rather than simply applying the ordinary first degree felony range.

These are statutory punishment ranges, not predictions about the outcome of a particular case. Prior convictions, drug-free zone allegations, and other enhancement provisions can also affect potential punishment.

What If Heroin Is Found in a Vehicle?

Vehicle searches frequently create disputes over possession.

Police may find a substance:

• Under the driver’s seat
• Under the passenger seat
• Inside the center console
• In the glove compartment
• In luggage
• In the trunk
• Inside a passenger’s bag
• In a hidden compartment

The fact that drugs were somewhere inside a vehicle does not automatically establish who knowingly possessed them.

Important questions may include:

• Who owned the vehicle?
• Who normally drove it?
• Was it borrowed or rented?
• How long had the accused been in the vehicle?
• Where exactly were the drugs found?
• Were they visible?
• Could the accused reach them?
• Who owned the container?
• Did another occupant claim ownership?
• Were fingerprints or DNA collected?
• What did body camera footage show?
• What statements did each occupant make?

The defense should examine the actual connection between the accused person and the substance.

What If Heroin Is Found in a Shared Home?

The same problem can arise in houses, apartments, hotel rooms, and other shared spaces.

Police may find drugs inside a bedroom, bathroom, kitchen, garage, closet, or common area.

Investigators may try to connect one person to the drugs using:

• Lease records
• Mail
• Clothing
• Identification
• Photographs
• Personal belongings
• Fingerprints
• DNA
• Keys
• Statements
• Phone records
• Text messages

When several people have access to a property, simply proving that heroin was present does not necessarily establish which person knowingly possessed it.

Search and Seizure Issues in Heroin and Opioid Cases

Drug evidence is only useful to the prosecution if it can legally be used in court.

Heroin and opioid charges frequently arise from:

• Traffic stops
• Vehicle searches
• Home searches
• Hotel searches
• Probation searches
• Search warrants
• Searches of bags or luggage
• Package investigations
• Phone searches

The defense may examine:

• Why the original stop occurred
• Whether police had reasonable suspicion
• Whether the detention was unlawfully extended
• Whether consent was actually given
• Whether consent was voluntary
• Whether officers had probable cause
• Whether a warrant was supported by sufficient information
• Whether police exceeded the scope of the warrant
• Whether digital evidence was lawfully obtained

If important evidence resulted from an unlawful search or seizure, a motion to suppress may become an important part of the defense.

Why Laboratory Testing Matters

Powder, residue, capsules, or pills cannot reliably be classified as heroin simply because an officer believes that is what they look like.

Laboratory analysis may determine:

• Whether heroin was actually present
• Whether fentanyl was present
• Whether another opioid was identified
• Whether several controlled substances were mixed together
• The aggregate weight
• Which packages were tested
• Whether the evidence matches what police submitted
• Whether the chain of custody can be established

This can become particularly important when the substance allegedly purchased or possessed was represented as one drug but tested as another.

What If the Case Involves Counterfeit Pills?

Counterfeit pills create additional problems because appearance may not reveal what the pill actually contains.

A tablet made to resemble oxycodone or another prescription opioid could contain fentanyl, another controlled substance, or a mixture.

Questions may include:

• What did the accused believe the pills contained?
• What did laboratory testing identify?
• How were the pills obtained?
• What was represented about them?
• Were there labels or markings?
• What communications exist?
• Who controlled the pills?
• Was there evidence of an intent to deliver?

The substance identified by the laboratory and the person’s knowledge can both become important issues.

Counterfeit pills containing fentanyl may also trigger the separate Texas laws governing Penalty Group 1-B.

What Happens If an Overdose Is Involved?

An overdose can significantly change the investigation.

Police may examine:

• Who supplied the substance
• Messages between the people involved
• Phone records
• Payment applications
• Surveillance
• Witness statements
• Toxicology reports
• Autopsy findings
• Other substances found in the person’s system
• The timing of the alleged delivery

Texas Health and Safety Code Section 481.141 provides an enhanced punishment provision for certain manufacture or delivery offenses if the State proves beyond a reasonable doubt that the controlled substance manufactured or delivered by the defendant resulted in death or serious bodily injury. The statute applies to qualifying offenses under several delivery statutes, including Section 481.112.

That means an alleged heroin delivery connected to an overdose can involve issues far beyond an ordinary delivery case.

Causation, toxicology, the identity of the substance, the source of the drugs, and other substances involved may all require careful examination.

Is a Heroin Overdose Case the Same as a Fentanyl Murder Case?

No.

Texas Penal Code Section 19.02(b)(4) contains a specific murder provision involving the knowing manufacture or delivery of a Penalty Group 1-B controlled substance when another individual dies as a result of introducing that substance into the body. Penalty Group 1-B includes fentanyl and listed fentanyl derivatives.

Heroin is in Penalty Group 1, not Penalty Group 1-B.

That distinction matters.

A heroin-related death can still create serious criminal exposure depending on the allegations and evidence, including the enhancement provisions of Section 481.141 and potentially other criminal laws. But the specific fentanyl murder provision in Section 19.02(b)(4) is tied to Penalty Group 1-B.

If laboratory testing identifies fentanyl in a substance believed to be heroin, the legal analysis can therefore change significantly.

Does Texas Have an Overdose Good Samaritan Defense?

Texas law provides a limited defense to prosecution for certain lower-level possession offenses when emergency medical assistance is requested for a possible overdose.

For an offense involving possession of less than one gram under Section 481.115, the statute provides a defense in certain circumstances when a person is the first to request emergency medical assistance for another person’s possible overdose, remains at the scene, and cooperates with medical and law enforcement personnel. The statute also covers certain overdose victims for whom emergency assistance was requested.

The defense has important restrictions and exceptions. Prior drug cases, other criminal activity, previous use of the defense, previous overdose assistance requests within the statutory period, and circumstances involving an ongoing arrest or search warrant can affect eligibility.

It is not a blanket immunity from prosecution.

Whether the defense applies should be evaluated from the exact facts.

Confidential Informants and Controlled Buys

Heroin investigations sometimes rely on confidential informants or undercover officers.

An informant may claim to have:

• Purchased heroin
• Observed a delivery
• Introduced an alleged buyer and seller
• Communicated with the accused
• Provided information for a search warrant

The reliability of the informant can be important.

Questions may include:

• Was the informant paid?
• Was the informant facing criminal charges?
• Was a benefit promised?
• Was the informant searched before the controlled buy?
• Was the informant searched afterward?
• Was the transaction recorded?
• Did police maintain surveillance?
• Did officers actually observe the alleged transfer?
• Was the substance purchased during the operation tested?
• Are the informant’s statements consistent?

An informant’s accusation should be examined against the other evidence.

Can Drug-Free Zone Allegations Increase the Penalty?

Potentially.

Texas law contains enhanced punishment provisions for certain drug offenses occurring in designated drug-free zones.

Depending on the charge and location, areas involving schools, playgrounds, youth centers, school buses, and certain other facilities can affect the punishment range.

The State must still establish that the location meets the statutory definition and that the required distance applies.

Maps, measurements, property boundaries, and the exact location of the alleged conduct may become important.

Possible Defenses to Texas Heroin and Opioid Charges

There is no single defense for every heroin or opioid case.

Depending on the facts, possible issues may include:

• The drugs belonged to another person
• The State cannot prove knowing possession
• Several people had access to the location
• The accused did not control the vehicle or property
• Police conducted an unlawful stop
• Police conducted an unlawful search
• Consent was invalid
• A warrant lacked adequate probable cause
• Officers exceeded the scope of a warrant
• Laboratory testing identified a different substance
• The alleged weight is incorrect
• Chain of custody problems exist
• Evidence does not establish intent to deliver
• Digital communications have been misinterpreted
• A confidential informant is unreliable
• A controlled buy was improperly conducted
• The State cannot establish an alleged delivery
• Causation is disputed in an overdose case
• Toxicology evidence does not support the prosecution’s theory
• The statutory overdose defense applies to a qualifying possession case

A possible defense is not a promised outcome. The strength of each issue depends on the evidence and applicable law.

What Should You Do After a Heroin or Opioid Arrest?

Avoid trying to explain the case to police before understanding the potential consequences of your statements.

Do not:

• Delete text messages
• Destroy evidence
• Wipe a phone
• Contact an alleged buyer or supplier about the investigation
• Ask witnesses to change their statements
• Post details about the case on social media

Preserve information that may help explain what happened, including:

• Complete text conversations
• Receipts
• Prescription records
• Location information
• Vehicle records
• Witness information
• Photographs
• Medical records when relevant

Then speak with a Texas drug defense attorney who can determine what charge you are actually facing and what evidence supports it.

How I Defend Heroin and Opioid Charges Throughout Texas

Heroin and opioid investigations can become complicated quickly, particularly when laboratory testing reveals more than one substance or an overdose is involved.

My job is to separate the allegations from the evidence.

Tell Me What Happened

We begin with the arrest, investigation, search, alleged substance, and people involved.

Understand the Case

I examine the drug classification, alleged amount, possession evidence, laboratory results, search and seizure issues, delivery allegations, digital evidence, informants, and any overdose evidence.

Build a Path Forward

We identify what the State can prove, what can be challenged, and what options may be legally available.

I represent people facing heroin and opioid charges throughout Texas.

Frequently Asked Questions About Heroin and Opioid Charges in Texas

Is heroin possession a felony in Texas?

Generally, yes. Heroin is a Penalty Group 1 controlled substance, and possession of less than one gram is generally a state jail felony under Section 481.115.

Is heroin treated the same as fentanyl in Texas?

No. Heroin is in Penalty Group 1. Fentanyl and listed fentanyl derivatives are in Penalty Group 1-B. Simple possession uses the same Section 481.115 framework, but delivery and intent-to-deliver charges are governed by different statutes.

Can I be charged if heroin was found in someone else’s car?

You can be accused, but the State still must establish knowing possession. Vehicle ownership, location of the drugs, access, statements, fingerprints, DNA, belongings, and other circumstances may affect whether the prosecution can connect you to the substance.

What if I thought the substance was heroin but police say it contained fentanyl?

Laboratory testing may significantly affect the charge. Fentanyl is classified separately in Penalty Group 1-B and can carry different penalties for delivery or possession with intent to deliver.

Can someone face additional punishment if an alleged heroin delivery causes an overdose?

Potentially. Section 481.141 provides for increased punishment for certain qualifying manufacture or delivery offenses when the State proves beyond a reasonable doubt that the substance manufactured or delivered resulted in death or serious bodily injury.

Speak With a Texas Heroin and Opioid Defense Attorney

A heroin or opioid charge can carry serious consequences, but the name of the drug on the police report is only the beginning of the analysis.

The substance must be identified. Possession must be established. Weight must be supported by evidence. Searches must comply with the law. And when prosecutors allege delivery, intent, fentanyl contamination, or an overdose, those allegations must also be proven.

If you are facing a heroin or opioid charge anywhere in Texas, I can help you understand what the State is alleging and what options may be available.

Legal References

Texas Health and Safety Code Sections 481.102, 481.1022, 481.112, 481.1123, 481.115, 481.134, and 481.141.

Texas Penal Code Section 19.02.

Texas Code of Criminal Procedure Article 38.23.

Disclaimer

This page provides general educational information and is not legal advice. Texas and federal drug laws can change. The proper charge and potential punishment depend on the exact substance, formulation, quantity, laboratory evidence, alleged conduct, criminal history, and other circumstances. No dismissal, reduction, acquittal, probation, or other outcome is promised or guaranteed. Visiting this website or contacting the firm does not by itself create an attorney-client relationship.

Last reviewed: August 31, 2026