In The

Court of Appeals

Sixth Appellate District of Texas at Texarkana

______________________________

No. 06-07-00113-CV

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IN THE MATTER OF D.W.P.

 

On Appeal from the County Court at Law, Sitting as a Juvenile Court

Harrison County, Texas

Trial Court No. 3840

 

Before Morriss, C.J., Carter and Moseley, JJ.

Memorandum Opinion by Justice Moseley
"In juvenile proceedings, the requirements for admissibility of evidence in revocation 1

proceedings appear not to differ much from those in adjudication proceedings." Robert Dawson,

Texas Juvenile Law 254 (6th ed. 2004).

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MEMORANDUM OPINION

D.W.P., a juvenile, was adjudicated a delinquent child by the trial court for possessing

marihuana in a school zone and placed on probation. When informed by an assistant principal of

Marshall High School that D.W.P. was acting unusual, Officer Shawn Estes administered a "drug

screen" to D.W.P. At trial, D.W.P. objected to the reliability of the drug screen under Daubert. See

Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579, 592 (1993);see also E.I. du Pont de Nemours

& Co. v. Robinson, 923 S.W.2d 549, 550 (Tex. 1995); Kelly v. State, 824 S.W.2d 568, 573 (Tex.

Crim. App. 1992). Officer Estes was unable to remember the name of the drug screen which was

performed. Officer Estes also testified he did not know the underlying scientific principles of the

drug test or whether the test had been peer reviewed. The trial court admitted the evidence over

D.W.P.'s objection and modified the prior disposition. The failure of the drug screen was the sole

ground for modification. On appeal, D.W.P.'s sole issue is that the trial court erred in admitting the

evidence of the drug test without adequate evidence of its reliability. The State concedes the

admission of the urine test results was error and requests this Court to reverse and remand this case.

Even though appeals of juvenile court orders are generally treated as civil cases, we believe

the criminal standard for the admission of scientific evidence should apply in light of the 1

quasi-criminal nature of juvenile proceedings. See In re D.I.B., 988 S.W.2d 753, 756 (Tex. 1999).
We note that at trial the State argued proof of reliability was not necessary, making an 2

analogy to radar guns. The underlying scientific theory and the technique applying the theory for a

few techniques, such as the intoxilyzer and radar guns, have been statutorily or judicially recognized

as valid. See TEX. TRANSP. CODE ANN. § 524.038 (Vernon 2007); Mireles v. Tex. Dep't of Pub.

Safety, 9 S.W.3d 128, 131 (Tex. 1999); Stevenson v. State, 895 S.W.2d 694, 698–99 (Tex. Crim.

App. 1995); Mills v. State, 99 S.W.3d 200, 202 (Tex. App.—Fort Worth 2002, pet. ref'd); Tex. Dep't

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The proponent of scientific evidence must prove, by clear and convincing evidence, that the evidence

is both relevant and reliable in order for the evidence to be admissible. Kelly, 824 S.W.2d at 573.

To be considered reliable, evidence based on a scientific theory must satisfy three criteria: (1) the

underlying scientific theory must be valid; (2) the technique applying the theory must be valid; and

(3) the technique must have been properly applied on the occasion in question. Id.; Scherl v. State,

7 S.W.3d 650, 651–52 (Tex. App.—Texarkana 1999, pet. ref'd).

The State admits error based on Hernandez v. State, 116 S.W.3d 26, 31–32 (Tex. Crim. App.

2003). In Hernandez, the defendant's probation was revoked based on a urine test for the presence

of drugs using a machine called an ADx analyzer. Id. at 28. However, the technician was unable

to explain how the ADx analyzer worked or the scientific theory behind the ADx analyzer. Id. The

Texas Court of Criminal Appeals held "[a]lthough appellate courts may take judicial notice of other

appellate opinions concerning a specific scientific theory or methodology in evaluating a trial judge's

Daubert/Kelly 'gatekeeping' decision, judicial notice on appeal cannot serve as the sole source of

supportfor a bare trial courtrecord concerning scientific reliability." Id. at 31–32 (footnote omitted).

In this case, there is no evidence of the underlying scientific theory or that the technique

applying the theory is valid. While Officer Estes described what steps he took in performing the 2
of Pub. Safety v. Jimenez, 995 S.W.2d 834, 837–38 (Tex. App.—Austin 1999, no pet.). The parties

have not cited us any authority that the theory or technique of the urine test at issue has been

recognized as valid. Further, even when the first two criteria have been met by legislative finding

or judicial fiat, the State is still required to prove the technique was properly applied on the occasion

in question. Reynolds v. State, 204 S.W.3d 386, 391 (Tex. Crim. App. 2006). Officer Estes's

testimony was insufficient to establish that he properly applied the technique on the occasion in

question. 

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test, he was unable to testify that those steps were consistent with a prescribed procedure. When

asked what was the first step of the "directions on the administration of the test," Officer Estes stated,

"As far as exactly what the directions say, I do not know what's one, two, three, four, no. I can't tell

you that." The record contains no evidence, other than Officer Estes's testimony, concerning the drug

test introduced. The trial court erred in admitting the test results over D.W.P.'s objection. 

We reverse the order of the trial court and remand this case for proceedings consistent with

this opinion. 

Bailey C. Moseley

Justice

Date Submitted: January 3, 2008

Date Decided: January 4, 2008