Section 37.04 is a short definitional provision that carries enormous weight: it is the dividing line between a Class A misdemeanor and a third-degree felony.
What the Statute Says
(a) A statement is material, regardless of the admissibility of the statement under the rules of evidence, if it could have affected the course or outcome of the official proceeding.
(b) It is no defense to prosecution under Section 37.03 (Aggravated Perjury) that the declarant mistakenly believed the statement to be immaterial.
(c) Whether a statement is material in a given factual situation is a question of law.
Why It Matters
| Offense | Requirements | Level |
|---|---|---|
| Perjury (37.02) | False statement under oath, with intent to deceive and knowledge of its meaning | Class A Misdemeanor |
| Aggravated Perjury (37.03) | Perjury plus a statement made during or in connection with an official proceeding that is material | Third-Degree Felony |
Everything about the exposure in a perjury case therefore turns on this one definition.
The Three Rules in the Statute
Admissibility is irrelevant. A statement can be material even if it would have been excluded under the rules of evidence. The question is its potential effect on the proceeding, not whether a judge would have let it in.
The defendant's belief is irrelevant. Subsection (b) forecloses the intuitive defense. A witness who genuinely thought a detail did not matter has no defense on that basis.
The judge decides. Subsection (c) makes materiality a question of law. That is unusual and strategically important: it means materiality is litigated to the court, in a pretrial motion or a motion for directed verdict, rather than argued to a jury. A successful materiality challenge reduces a felony to a misdemeanor as a matter of law.
What "Could Have Affected" Means
The test is potential, not actual, effect. But it is not boundless. Statements that are genuinely collateral — background details with no bearing on any issue before the tribunal, matters relating to a claim that had already been resolved, or answers to questions on subjects the tribunal had no power to decide — can fall outside it.
The Related Provision on Inconsistent Statements
Section 37.06 provides that where a person has made two statements under oath that cannot both be true, the charging instrument need not allege which one is false, and the prosecution need not prove which one is false. Together with Section 37.04, it makes perjury prosecutions structurally easier for the State than most offenses — which is why the materiality question is usually the defense's best ground.
Related
- Perjury (37.02) · Aggravated perjury (37.03) · Inconsistent statements (37.06)
- Tampering with evidence (37.09)
Charged in Harris County?
Brian Foley is Board Certified in Criminal Law by the Texas Board of Legal Specialization and a former Harris County Felony Chief Prosecutor; Luis Baez is a former Trial Bureau Chief. Call or text (713) 703-1718 for a free, confidential consultation.