Texas has its own statutory exclusionary rule, independent from the federal constitutional exclusionary rule. Article 38.23 of the Texas Code of Criminal Procedure can prohibit the use of evidence obtained in violation of the United States Constitution, the Texas Constitution, or Texas law.
But determining whether Article 38.23 applies—and whether evidence should be excluded from trial—requires much more than simply identifying questionable police conduct. The defense must identify the specific violation, trace the connection between that violation and the evidence, and apply the applicable legal framework.
Texas Has Its Own Exclusionary Rule
Suppression issues in Texas are not limited to the federal exclusionary rule derived from the Fourth Amendment. The Texas Code of Criminal Procedure provides an independent statutory framework concerning illegally obtained evidence.
This is significant for Texas criminal defense because Article 38.23 can operate independently from federal constitutional doctrine. Texas courts may recognize suppression grounds based on Texas law alone, without requiring that a federal constitutional violation be established.
Understanding Article 38.23 is therefore an essential component of Texas criminal-defense strategy.
What Article 38.23 Does
Article 38.23 addresses evidence obtained in violation of constitutional or legal requirements. In plain language, the statute provides that evidence may be inadmissible if it was obtained in violation of rights protected by the federal Constitution, the Texas Constitution, or Texas law.
To apply Article 38.23, the defense must identify:
The allegedly unlawful conduct by police; the constitutional or statutory rule allegedly violated; the evidence obtained by police; and the connection between the violation and that evidence.
Article 38.23 is not a blanket prohibition on evidence. The statute requires analysis of what happened, why it was unlawful, what evidence resulted, and how the two are connected.
Start With the Alleged Violation
Saying "the search was illegal" is a conclusion, not analysis. The defense should identify precisely what police allegedly did unlawfully.
Examples of conduct that may require examination include:
An unlawful detention or traffic stop; warrantless entry into a home; exceeding the scope of consent to search; exceeding the authorized scope of a search warrant; an unlawful arrest; observations made from a location that lacked legal authority; statements obtained through improper interrogation; or evidence obtained following allegedly unlawful police conduct.
The defense must pinpoint the specific conduct and the specific rule or constitutional provision allegedly violated.
Then Identify the Evidence
The next question is straightforward but critical:
What evidence did police obtain because of the challenged conduct?
Depending upon the case, that evidence might include physical evidence such as drugs or firearms, statements or confessions, photographs or video, observations, digital information, laboratory analysis, or information later used to obtain a search warrant.
A careful defense analysis requires identifying the actual evidence the State intends to use and understanding exactly how that evidence came into police possession.
The Connection Between the Violation and the Evidence Matters
Suppression analysis requires examining the relationship between the alleged illegality and the evidence the State wants to use at trial. This is a critical point: a constitutional or statutory problem occurring somewhere during an investigation does not automatically mean every piece of evidence in the case becomes inadmissible.
The defense must establish that the challenged conduct actually led to the evidence now at issue. This may involve examining:
The chronology of the investigation; what officers knew before the challenged conduct; what they learned because of it; whether they would have discovered the evidence through an independent means; and doctrines such as attenuation or independent source that may break the causal chain.
These doctrines are separate and important issues that may become critical depending upon the specific facts.
Evidence Found After an Illegal Search
A concept often described as "fruit of the poisonous tree" addresses evidence discovered following unlawful police conduct. The issue is whether evidence was obtained through exploitation of the illegality or through a legally independent means.
If police unlawfully entered a home and observed drugs on a table, the drugs are directly connected to the illegal entry. But if police unlawfully stopped a vehicle and the driver then voluntarily confessed to a crime unrelated to that stop, the confession might be analyzed differently depending upon whether the connection between the violation and the statement was sufficiently attenuated.
The Criminal Defense Library separately addresses this issue in detail. The point here is that connection matters to Article 38.23 analysis.
A Later Search Warrant Can Complicate the Analysis
In some cases, police engage in disputed conduct and later obtain a search warrant. Article 38.23 analysis must then address several questions:
What did officers know before the disputed conduct? What did they learn because of it? What information appeared in the warrant affidavit? Did independent information support the warrant? How does the challenged conduct relate to the evidence ultimately seized?
If officers illegally entered a home, observed evidence of a crime, and then obtained a search warrant listing information discovered during the illegal entry, the affidavit's foundation becomes questionable. Conversely, if officers had probable cause before any disputed conduct and obtained a warrant based on information independent of the challenged activity, Article 38.23 analysis may proceed differently.
The Criminal Defense Library addresses pre-warrant entry and warrant-affidavit analysis in separate articles. These concepts intersect with Article 38.23 suppression analysis.
Texas Law Can Matter Independently
Article 38.23 is significant because its language specifically addresses evidence obtained in violation of constitutional protections or Texas law. This means the statute can reach situations in which no federal constitutional violation occurred.
For example, a statute or Texas case law might impose requirements on police that exceed federal constitutional minimums. If police violated those Texas-law requirements, Article 38.23 can still provide grounds for suppression even if the federal Constitution was not violated.
However, this important advantage requires careful legal analysis. Not every technical statutory violation automatically results in suppression. The precise legal provision, nature of the violation, statutory language, applicable cases, and relationship to the evidence must be analyzed with precision.
Article 38.23 and Motions to Suppress
Suppression issues are commonly litigated before trial through a motion to suppress. The court may hear testimony, review video and photographic evidence, consider documents, evaluate warrant materials, determine historical facts, and apply constitutional and statutory law.
A suppression hearing presents an opportunity for the defense to present evidence concerning how police conducted the investigation, what was said, where officers were positioned, what consent was requested, and how evidence was discovered.
The evidence needed for a suppression hearing may differ significantly from what appears in the initial police report. Body-camera footage, dash-camera video, dispatch records, witness testimony, photographs, and other materials can establish facts that bear upon Article 38.23 analysis.
Article 38.23 Can Also Matter at Trial
While Article 38.23 is often litigated through suppression motions before trial, the statute is not limited conceptually to pretrial proceedings. When evidence at trial raises a genuine factual dispute concerning how evidence was obtained, Texas law may present a separate question concerning whether an Article 38.23 jury instruction is appropriate.
If facts about how evidence was obtained are disputed, a jury instruction addressing Article 38.23 may require the jury to consider whether evidence was obtained in violation of constitutional or legal protections.
Complete analysis of jury instructions in Article 38.23 cases involves issues beyond this introductory article. The point here is that Article 38.23 suppression issues can arise both before and during trial.
Video Can Change the Suppression Analysis
Body-camera footage, dash-camera video, and surveillance footage can be particularly important in Article 38.23 analysis. Video evidence may establish:
When a detention or traffic stop began; what commands officers gave; what an officer said; what consent was requested; what consent was actually given; whether the occupant agreed or declined; where officers went; when entry into a location occurred; what was visible; when evidence was discovered; and how the sequence of events compares with the police report.
Video may also show that officers' representations in reports were inaccurate. A police report might describe what an officer claims to have observed, while video reveals the officer's actual vantage point or physical location when the alleged observation occurred.
Written reports and video should be compared rather than assuming either tells the entire story by itself.
Suppression Requires a Precise Theory
A strong defense analysis should be able to answer these specific questions in sequence:
What did police do? Why was that conduct unlawful? What specific constitutional or statutory rule was violated? What evidence resulted from that conduct? How did the violation lead to that evidence? What does the State contend made the conduct lawful? Does an exception, doctrine, or separate legal theory affect admissibility?
Precision is more useful than simply labeling an entire investigation "illegal." A defense argument such as "the officers violated Article 38.23" is a conclusion. An effective suppression argument identifies the specific violation, explains why it matters, connects it to the evidence, and addresses what the State will likely argue about lawfulness or exceptions.
Article 38.23 Makes the Evidence Trail Matter
A criminal-defense lawyer reviewing a case should not merely identify what evidence the State possesses. The defense should also determine how the government obtained it.
When police conduct raises constitutional or statutory questions under Article 38.23, the history of the evidence becomes an essential part of the defense investigation. Where did it come from? How was it discovered? What happened immediately beforehand? Were there legal alternatives?
The objective is not to assume evidence will be suppressed. It is to identify the governing law, reconstruct the facts, trace the evidence to its source, examine the conduct that led to its discovery, apply Article 38.23 and related doctrine, and determine what Texas law permits the State to use at trial.
This disciplined methodology—examining not just what evidence exists but how police obtained it—is central to effective Texas criminal defense.