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Judge orders defendant fingerprinted, admits courtroom fingerprint comparison over defense challenge
Summary
In the 187th District Court, Judge Stephanie Boyd granted the state’s motion to fingerprint the defendant and denied a defense challenge to admit a courtroom fingerprint comparison; a Bexar County fingerprint examiner testified the prints matched a Tarrant County judgment.
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Judge Stephanie Boyd of the 187th District Court granted the state’s motion to require the defendant be fingerprinted and allowed a fingerprint examiner to testify after a defense challenge to the method was denied.
The ruling came during a pretrial/punishment-phase hearing in which the state asked the court to have an examiner take inked prints in the courtroom and compare them to prints on a prior booking/judgment. The examiner, Mia Valdez, identified herself as a fingerprint examiner with the Bexar County Sheriff’s Office and testified she had taken the defendant’s ink prints in the courtroom and compared them to a booking card and a judgment from Tarrant County. Valdez testified, “A fingerprint is an impression made up of characteristics that is used for a means of identification for an individual,” and told the court the right thumbprint on the judgment matched the thumbprint she took in court: “They were a match.”
Defense counsel argued the comparison failed the Daubert/Kelly standard for scientific evidence, saying the courtroom comparison was not peer reviewed, that the examiner had limited formal training (a two-week course plus on-the-job experience), and that no independent check or documentation of the examiner’s visual comparison was produced. The defense urged exclusion on grounds the procedure was “definitionally unscientific” and raised concerns about reliability and due process.
The court rejected the defense’s motion to exclude the testimony and allowed the fingerprint evidence, noting the hearing was limited to qualification of the witness and admissibility of the comparison. The court admitted state exhibits P1 and P2 (the ink-print card and the judgment) and later admitted P4 (booking photos and associated identifying data). The judge also granted the state’s initial request to have the defendant fingerprinted.
Why it matters: The admitted fingerprint comparison was offered by the state to prove up a prior judgment for sentencing purposes. If the jury finds the defendant guilty on punishment, the previously adjudicated convictions and the fingerprint comparisons may be used in assessing punishment.
Key details and evidence: Valdez testified she conducted the fingerprint comparison in the courtroom after taking the defendant’s ink prints there. The judge allowed the examiner to testify despite the defense’s challenge under the Daubert/Kelly evidentiary standard. The court also ruled that whether the jury may be told about possible stacking of sentences (concurrent vs. consecutive) can be addressed later; the court said jurors may be told the court, not the jury, decides whether sentences run consecutively or concurrently.
Court rulings and procedural notes: The court (Judge Stephanie Boyd) granted the state’s motion to require fingerprinting and denied the defense’s motion to exclude the courtroom comparison under the Daubert/Kelly standard. State exhibits P1 and P2 were admitted; P4 (booking photos and identifiers) was also admitted. Defense counsel preserved objections to aspects of the underlying process and documentation.
Ending: The fingerprint examiner was excused after completing testimony; the matter will be part of the record for the punishment phase. The court returned the jury to continue the punishment-phase proceedings after resolving the Daubert/Kelly challenge and admitting exhibits.

