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Tampering with evidence is the charge that turns a small case into a felony. In Harris County it is most often filed not against someone shredding documents, but against someone who dropped, swallowed, or threw something during a traffic stop or a foot chase.

What the Statute Prohibits

A person commits an offense if, knowing that an investigation or official proceeding is pending or in progress, he:

  1. alters, destroys, or conceals any record, document, or thing with intent to impair its verity, legibility, or availability as evidence in the investigation or proceeding; or
  2. makes, presents, or uses any record, document, or thing with knowledge of its falsity and with intent to affect the course or outcome of the investigation or proceeding.

A separate subsection makes it an offense to alter, destroy, or conceal a record, document, or thing knowing that an offense has been committed, with intent to impair its availability as evidence — a lower knowledge threshold than "investigation pending."

Penalties

ConductOffense levelPunishment
Tampering with physical evidence (general)Third-Degree Felony2 – 10 years in prison, up to $10,000 fine
The evidence is a human corpseSecond-Degree Felony2 – 20 years in prison
Failing to report a corpse in certain circumstancesClass A MisdemeanorUp to 1 year county jail

The Traffic-Stop Cases

The typical Houston tampering prosecution looks like this: officers approach a car, the driver drops a baggie between the seats, throws it out the window, or swallows it. The underlying possession may be a state jail felony or even a Class B — but the tampering allegation is a third-degree felony, and it frequently becomes the more serious charge.

The element the State often cannot prove

Tampering requires knowledge that an investigation was pending or in progress. Someone who discards something as a patrol car passes, before any stop, detention, or contact, may not have that knowledge. Body-camera timing — exactly when the lights came on, when the officer made contact, and when the item left the person's hand — decides a great many of these cases.

Defenses

No knowledge of an investigation. As above. The timeline is everything, and the video usually establishes it.

No intent to impair availability. Dropping something in a panic is not the same as concealing it to keep it from officers. Where the item was immediately recovered and remained fully available as evidence, the intent element is weak.

The item was recovered intact. Texas courts have addressed whether conduct that leaves evidence fully usable satisfies the statute. Where officers retrieved the item in seconds, in plain view, the "concealment" theory is vulnerable.

It was not evidence. The thing altered or destroyed must have evidentiary significance to the investigation.

Identity and possession. In multi-occupant vehicles, proving who discarded what is often impossible.

Related

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.

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Frequently Asked Questions


What is tampering with evidence in Texas?
Under Section 37.09, a person commits an offense if, knowing that an investigation or official proceeding is pending or in progress, he alters, destroys, or conceals any record, document, or thing with intent to impair its verity, legibility, or availability as evidence. It also covers making or presenting a thing known to be false with intent to affect the outcome.
Is tampering with evidence a felony in Texas?
Yes. Tampering with physical evidence is generally a third-degree felony — 2 to 10 years in prison and a fine of up to $10,000. Where the evidence is a human corpse, the offense is a second-degree felony. A related provision covering failure to report a corpse is a Class A misdemeanor.
Can I be charged for throwing something away during a traffic stop?
Yes, and this is the most common fact pattern in Harris County. Discarding a bag of narcotics, tossing something out a window, or swallowing a substance during a stop is routinely charged as tampering — often turning a misdemeanor or state jail case into a third-degree felony.
Does an investigation have to be officially opened?
The State must prove the defendant knew an investigation was pending or in progress. That is frequently the weakest element — a person who discards something before any police contact, or without knowing officers were investigating anything, may not satisfy it.
Can tampering be charged even if the underlying case is dismissed?
Yes. Tampering is a standalone offense. It is common for the drug case to be dismissed on a suppression issue while the tampering charge proceeds, which is why it must be defended on its own terms.

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