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DNA Evidence in Texas Aggravated Sexual Assault Cases
Learn the limits of DNA evidence in Texas aggravated sexual assault cases, including identity, timing and the separate aggravating allegation.
In short: DNA can be relevant to identity or biological contact, but it does not by itself answer every element of aggravated sexual assault. The sample’s source, collection, interpretation and relationship to the alleged event matter. The State must still prove the applicable charged conduct and aggravating circumstance.
Explore this page 9 sections
Does a DNA association establish when contact occurred?
Not necessarily. A laboratory association must be interpreted in the context of the sample and surrounding evidence. Timing and the circumstances of contact may remain separate disputed issues.
Does absence of DNA require dismissal?
No. The statute does not make DNA recovery a universal element. Testimony and other evidence may still be offered. The absence should be assessed for its actual significance rather than turned into a guaranteed outcome.
What laboratory questions should counsel ask?
Ask which item was tested, whether the result involved a mixture, what limitations the report states and how the item was handled. Qualified review should address the actual report and underlying records, not general claims that DNA is always conclusive or always unreliable.
A practical example and questions for counsel
Hypothetical example: Suppose a laboratory report associates a person with biological material on an item. Before drawing a legal conclusion, identify where the material was found, what the test can establish and what it cannot date or explain. Counsel should compare those limits with the actual allegation. The result may be important without independently proving nonconsent or an aggravating circumstance. A review should also distinguish an inclusion, an exclusion and an inconclusive result rather than summarize all laboratory language as a definitive match.
How this fits Texas law
Section 22.021 combines specified sexual conduct with an aggravating circumstance. These can concern the alleged conduct, the victim’s age or a legally defined protected status. It is a first-degree felony, and subsection (f) imposes a 25-year minimum in specified child cases. The precise allegation and offense date must be checked before applying a penalty summary.
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Last updated October 2026
Common questions
Does a DNA association establish when contact occurred?
Not necessarily.
Does absence of DNA require dismissal?
No.
What laboratory questions should counsel ask?
Ask which item was tested, whether the result involved a mixture, what limitations the report states and how the item was handled.
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This page provides general information about Texas law. It is not legal advice, and reading it does not create an attorney-client relationship.