Affirmed and Memorandum Opinion filed August 30, 2012.

In The

Fourteenth Court of Appeals 

NO. 14-11-00863-CR

CHRISTOPHER LEE WEBER, Appellant

V.

THE STATE OF TEXAS, Appellee

On Appeal from the County Criminal Court at Law No. 12

Harris County, Texas

Trial Court Cause No. 1644822

M E M O R A N D U M O P I N I O N

Appellant Christopher Lee Weber appeals his conviction for driving while 

intoxicated, asserting that the trial court erred in denying his motion to suppress the 

results of a breath test. We affirm. 
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FACTUAL AND PROCEDURAL BACKGROUND

Appellant was charged by information with the offense of driving while 

intoxicated. Appellant filed a pre-trial motion to suppress all evidence, namely a breath 

test taken from appellant at the police stationhouse following an automobile accident.

At a hearing on appellant’s motion, Julio Rincones testified that he was a peace 

officer certified to operate the Intoxilyzer 5000, a breath-test machine, and administered a

breath test to appellant using the machine. Rincones claimed to have observed appellant 

for fifteen minutes before administering the test to ensure that no foreign objects were

introduced into appellant’s mouth to affect the outcome of the test; Rincones also 

inspected appellant’s mouth to confirm he had nothing inside his mouth. Rincones 

testified that he checked the temperature for the reference sample and that it was within 

an allowable range. A circuit check of the machine gave an “okay” result. During a 

routine test, two samples are given; an acceptable variance between the two samples is 

0.02 grams based on 210 liters of breath. Appellant’s test results, as reflected by the 

breath-test strip, showed 0.197 grams of alcohol per 210 liters of breath for the first 

sample and 0.196 grams of alcohol per 210 liters of breath for the second sample. Based 

on the these test results, Rincones formed the opinion that appellant was intoxicated. 

Although Rincones is a certified operator of the Intoxilyzer 5000, he is not qualified to 

testify about the underlying theory and science of the machine.

Marianela Martinez is a state-certified breath technical supervisor who supervises 

and maintains the same machine that Rincones used to administer the breath test to 

appellant. In addition to her college education, Martinez holds a certification from the 

completion of courses to operate, repair, and maintain the Intoxilyzer 5000. She 

explained that the underlying scientific theory of the Intoxilyzer 5000 is based on infrared 

spectroscopy in which the machine measures light intensity in a breath sample. In the 

scientific community, the theory is considered valid. 
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Martinez testified that she personally inspects the machine on-site once a month

and remotely monitors the machine by modem or computer once or twice a week or 

every two weeks. During this remote monitoring, Martinez’s computer connects with the 

machine and conducts a diagnostic check of voltages, readings, and internal standards 

and a calibration check to ensure the reference sample is within a tolerance range. 

Prior to the test administered to appellant on November 29, 2009, Martinez and 

another certified technical supervisor with the same qualifications, Lee Anne Spino, last 

checked the machine on-site and changed the reference sample solution on November 18, 

2009. On that date, Martinez and Spino engaged in a “sign-over” in which Spino, who 

had temporarily supervised the machine, signed over her supervision of the machine to 

Martinez’s supervision, and then they conducted tests on the machine to ensure it 

functioned properly. Martinez testified that Spino mixed the reference sample solution at 

a remote location, Martinez poured the solution into the machine, and, together, the two

ran a test and verified the accuracy of the solution. The machine produced two slips for 

Martinez’s and Spino’s respective signatures indicating that both were on-site changing 

the reference sample solution. According to Martinez, the machine functioned properly 

following the tests and required no repairs either during her on-site check on November 

18, 2009, or during a subsequent on-site check on December 23, 2009. 

Martinez testified that the reference sample solution is sent to an agency in Austin, 

Texas, once or twice a year to ensure that the concentration of the solution was made 

within the appropriate parameters; according to Martinez, there was nothing wrong with 

the particular reference sample used in administering appellant’s test. Martinez did not 

have records to prove that the reference solution was independently verified in this case; 

however, during her remote monitoring of the machine, the calibration check reflected 

that the reference sample was within the appropriate tolerance range.

Martinez testified that before appellant’s breath test, she had never personally 

calibrated that particular machine, although she believed she had reviewed the calibration 
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records associated with that particular machine. The record contains no calibration 

records on the machine, and Martinez was unable to produce them to appellant’s counsel 

under subpoena. Martinez testified that even without records of the machine’s 

calibrations, the machine had to have been calibrated properly and certified by the Texas 

Department of Public Safety before the machine could be released into her supervision. 

Martinez inspected the breath-test strip from appellant’s breath test. She noted 

that it reflects the result of the reference analysis, which was within the predicted 

tolerance value. According to Martinez, the test would be invalidated in any of the 

following scenarios: 

If the reference sample were outside of the predicted tolerance range,

If the first sample breath resulted in a much higher reading than the second 

sample, resulting in residual alcohol,

If the machine were unable to return to the same baseline reading detected 

before the beginning of the test, or

If a sample were not provided properly or at the wrong time.

Martinez testified that the machine conducts all functions automatically and that the 

operator, who simply pushes one button, is incapable of influencing the test results.

According to Martinez, the scientific technique was properly applied in this case.

Appellant testified that he consumed three alcoholic beverages between 10:00 a.m.

and 11:30 a.m. on November 29, 2009. He was later involved in an automobile 

accident; officers responded to the scene and administered field-sobriety tests to 

appellant. Appellant claimed to have possibly dropped his foot several times during a 

field-sobriety test involving a one-leg stand. Appellant claimed to have possibly leaned 

against a wall for support during a walk-and-turn field-sobriety test. Appellant admitted 

to having to restart his recitation of the alphabet at least once and again during a 

recitation of numbers in a field-sobriety test. Appellant was arrested around 6:40 p.m. 
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and transported to the police station, which was a few minutes’ drive from that location. 

Appellant claims that, at the stationhouse following his arrest, Rincones spent only a few 

minutes with him before conducting the breath test; but, appellant also acknowledged

that Rincones could have spent longer than fifteen minutes observing him. 

The trial court denied appellant’s motion to suppress. Appellant then entered a 

plea of “guilty” to the charged offense. After finding appellant guilty, the trial court 

sentenced appellant to 180 days’ confinement in a county jail, probated for one year, and 

assessed a fine. 

ISSUES AND ANALYSIS

In a single issue, appellant challenges the trial court’s denial of the motion to 

suppress the breath-test results, asserting that the scientific technique in administering the 

breath test to appellant was not properly applied. Appellant asserts his Sixth Amendment 

right to confront his accusers was violated because the State failed to present an expert 

scientific witness to testify about the calibration of the Intoxilyzer 5000 machine and the 

reference sample to show that the machine was working properly. Appellant also asserts 

that he was denied due process as a result of the State’s failure to produce an expert 

witness with knowledge of the machine’s calibrations. Appellant relies on the case of 

Bullcoming v. New Mexico, —U.S. —, —, 131 S. Ct. 2705, 180 L. Ed. 2d 610 (2011), 

which addresses both arguments. 

We review a trial court’s ruling on a motion to suppress under an abuse-of 

discretion standard. See Villarreal v. State, 935 S.W.2d 134, 138 (Tex. Crim. App. 

1996); Scillitani v. State, 343 S.W.3d 914, 920 (Tex. App.—Houston [14th Dist.] 2011, 

pet. ref’d). At a hearing on a motion to suppress, the trial court is the sole judge of the 

credibility of the witnesses and the weight to be given to their testimony. Romero v. 

State, 800 S.W.2d 539, 543 (Tex. Crim. App. 1990); Scillitani, 343 S.W.3d at 921. We 

afford almost complete deference to the trial court’s determination of historical facts 

supported by the record, as well as to mixed questions of law and fact dependent on the 
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determination of a witness’s credibility and demeanor. See State v. Ross, 32 S.W.3d 853, 

856 (Tex. Crim. App. 2000); Scillitani, 343 S.W.3d at 921. We consider issues that 

present purely legal questions under a de novo standard. See Ross, 32 S.W.3d at 856; 

Scillitani, 343 S.W.3d at 921.

When evidence of alcohol concentration, as shown by the results of analysis of a 

breath specimen taken at the request or order of a peace officer, is offered (1) the 

underlying scientific theory must be determined by the legislature to be valid; (2) the 

technique applying the theory has been determined by the legislature to be valid when a 

specimen was taken and analyzed by individuals who are certified by, and were using 

methods approved by, the Texas Department of Public Safety; and (3) the trial court must 

determine whether the technique was properly applied in accordance with the 

department’s rules on the occasion in question. See Reynolds v. State, 204 S.W.3d 386, 

390–91 (Tex. Crim. App. 2006 (applying standard in Kelly v. State, 824 S.W.2d 568, 573

(Tex. Crim. App. 1992) to breath-test results). By statute, the Texas Legislature has 

recognized the validity of the scientific theory and the technique behind the Intoxilyzer, 

as reflected in the first two prongs. See Tex. Transp. Code Ann. § 724.064 (West 2011); 

Tex. Transp. Code Ann. § 724.016 (West 2011); Stevenson v. State, 895 S.W.2d 694, 696 

(Tex. Crim. App. 1995). Appellant challenges only the third prong, pointing to 

Martinez’s testimony that she had no personal, first-hand knowledge of the calibration of 

the Intoxilyzer 5000, in ascertaining whether the scientific technique was properly 

applied during appellant’s breath test. Appellant also refers to Martinez’s testimony that 

she did not personally mix the reference sample solution or independently verify the 

accuracy of the solution’s concentration. 

An expert witness may base an opinion or inference on facts or data perceived by, 

reviewed by, or made known to the expert before testifying. See Tex. R. Evid. 602; Tex. 

R. Evid. 703. Appellant does not challenge Martinez’s expert qualifications; rather,

appellant claims that Martinez lacked personal, first-hand knowledge of the machine’s 
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calibrations and the preparation of the reference sample. Although appellant asserts that 

Martinez was “wholly unfamiliar with the machine” used to administer the breath test to 

appellant, the record reflects that Martinez received extensive training specific to the 

Intoxilyzer 5000, and had served as a certified technical supervisor for nearly a decade,

and had worked specifically with Harris County. She began supervision of the specific 

machine used in appellant’s breath test on November 18, 2009.

The record reflects that Martinez had personal knowledge of Spino’s certification 

as a technical supervisor. See Henderson v. State, 14 S.W.3d 409, 412 (Tex. App.—

Austin 2000, no pet.). According to the record, on November 18, 2009, although Spino 

prepared the reference sample solution outside of Martinez’s presence, Martinez, herself, 

poured the reference sample solution into the chamber of the machine. See id. (involving 

an expert witness technical supervisor who testified about a reference sample solution 

prepared by a different technical supervisor). Together, the two technical supervisors 

conducted tests on the machine to ensure it functioned properly and verified the accuracy 

of the solution. Had the solution been improperly formulated, the machine would have 

indicated “out of tolerance” and would have invalidated the breath test. According to 

Martinez, the machine functioned properly following these tests and again on December 

18, 2009, when she next checked the machine on-site, without the need for maintenance 

or repairs in the interim. Martinez testified that if the reference sample is not within the 

accepted tolerance range, the test would be invalidated and “can’t be run.” Based on the 

fact that the machine was functioning properly at the on-site check prior to appellant’s 

test and at the December on-site check after appellant’s test, Martinez opined that the 

machine was functioning properly during appellant’s test. 

Likewise, Martinez also stated that during her remote monitoring of the machine, 

the diagnostic check of the machine’s calibrations reflected that the reference sample was 

within the appropriate tolerance range. Although Martinez did not personally calibrate 

the machine or have records of the calibration history prior to November 18, 2009, she 
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testified that the machine would not have been released into her supervision if it had not 

been properly calibrated and certified for use by the State. 

Appellant contends that, because Martinez had no first-hand knowledge about the 

calibration of the machine and could not produce records of the machine’s calibration 

history, the admission of the breath-test results violated appellant’s right to confrontation. 

The Sixth Amendment of the United States Constitution provides that “in all criminal 

prosecutions, the accused shall enjoy the right . . . to be confronted with the witnesses 

against him.” U.S. CONST. amend. VI. Testimonial, out-of-court statements are not 

admissible unless it is shown that the declarant is unavailable to testify and the accused

had a prior opportunity for cross-examination. Crawford v. Washington, 541 U.S. 36, 68, 

124 S. Ct. 1354, 1374, 158 L. Ed. 2d 177 (2004). 

Appellant cites to Bullcoming for the proposition that “any and all analytical, 

scientific data that the State intends to use at trial must be presented to the defense by a 

person who authored the data.” See 131 S. Ct. 2705, 180 L. Ed. 2d 610 (2011). In 

Bullcoming, the Supreme Court of the United States addressed the issue of “surrogate

testimony” for a forensic report that established an element, intoxication, of the charged 

offense; the report was deemed testimonial. See id., 131 S. Ct. at 2713, 2715–18. While

the calibration history of the Intoxilyzer machine in this case may be relevant to the

foundation for the admissibility of the breath-test results, documents prepared in the 

regular course of equipment maintenance may be non-testimonial. See Melendez-Diaz v. 

Massachusetts, 557 U.S. 305, 129 S. Ct. 2527, 2532 & n.1, 174 L. Ed. 2d 314 (2009) 

(declining, expressly, to hold that anyone whose testimony that may be relevant to 

establishing the chain of custody, authenticity of a sample, or accuracy of a testing device 

must appear in person). Testimony of a supervisor about the maintenance and upkeep of 

the machine does not amount to a violation of appellant’s right of confrontation, as such 

records are not testimonial. See id.; see also Settlemire v. State, 323 S.W.3d 520, 522 

(Tex. App.—Fort Worth 2010, pet. ref’d) (noting that testimony of “technical analysts 
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who calibrate and operate equipment,” such as a technical supervisor in charge of 

Intoxilyzer machine, was admissible for purposes of maintenance records even though 

the supervisor was not in charge of the machine when the accused was arrested); 

Henderson, 14 S.W.3d at 412–13. 

Given Martinez’s testimony, we cannot conclude the trial court abused its 

discretion in denying appellant’s motion to suppress. See Henderson, 14 S.W.3d at 412–

13 (providing that trial court did not err in denying motion to suppress breath-test results 

when technical supervisor testified about a reference sample prepared by a different 

technical supervisor, who, at the time, was supervising the machine); see also Settlemire, 

323 S.W.3d at 522 (providing trial court did not err in admitting evidence of breath-test 

results into evidence at trial when technical supervisor, who was not in charge of 

Intoxilyzer machine at time of an accused’s arrest, testified about the maintenance 

records of Intoxilyzer machine). We overrule appellant’s sole issue.

The trial court’s judgment is affirmed.

/s/ Kem Thompson Frost

Justice

Panel consists of Justices Frost, McCally, and Mirabal.*

Do Not Publish — TEX. R. APP. P. 47.2(b).

 

*

Senior Justice Margaret Garner Mirabal sitting by assignment.