COURT OF APPEALS

EIGHTH DISTRICT OF TEXAS

EL PASO, TEXAS

IN RE: THE STATE OF TEXAS,

 Relator.

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No. 08-12-00177-CR

AN ORIGINAL PROCEEDING

IN MANDAMUS

O P I N I O N

The State of Texas has filed a petition seeking a writ of mandamus to compel the 

Honorable Patrick Garcia, Judge of the 384th District Court of El Paso County, to vacate 

portions of a pretrial discovery order. We conditionally grant relief.

FACTUAL SUMMARY

The real party in interest, Fidencio Valdez, is under indictment in Cause Number 

20120D00749 for the offense of capital murder. The State has filed written notice of its intent to 

seek the death penalty. The trial court entered a standard discovery order requiring the State to 

provide Valdez with the name and address of all witnesses the State intended to call at trial. The 

State complied with the order and provided Valdez with a prospective witness list with 

approximately 387 names. Several of the witnesses are listed as experts in various fields. 

Valdez filed a motion requesting that the State be ordered to produce the names of all of its 

expert witnesses, a complete statement of all opinions to be expressed by these experts, and the 

basis for those expert opinions. Valdez based his motion on Article 39.14(b) of the Code of 
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Criminal Procedure and Rules 104, 702, 703, and 705 of the Texas Rules of Evidence. 

At the hearing, the prosecutor told the trial court that the reports prepared by many of the 

State’s experts were in the State’s file and had already been provided to the defense. The 

prosecutor argued that Valdez was not entitled to any additional information regarding the 

State’s experts and if Valdez wanted to know the qualifications of the expert, he could ask during 

voir dire examination of the expert as provided by Texas Rule of Evidence 705. The trial court 

concluded the hearing without ruling on the motion. After the hearing, the State filed a written 

memorandum on the issue. The State continued to argue that Valdez’s requested discovery 

exceeded the scope of permissible discovery under Article 39.14. The State asserted that the 

written reports of the State’s “hard science” experts, such as DNA and ballistics, had already 

been provided to the defense, but some of the “soft science” experts had not created reports. 

Further, Valdez’s requested production would force the State and its “soft science” experts to 

create written reports solely for the benefit and use of defense counsel. 

The trial court later conducted an additional hearing on Valdez’s motion. At that hearing, 

the State continued to object to the motion as seeking discovery outside of the scope of Article 

39.14. The trial court took the position that Valdez was entitled to all of the information sought 

by the motion. Accordingly, the trial court required the State to produce the following:

(a) name and address of each testifying expert;

(b) a complete statement of all opinions to be expressed and the basis and reasons by each 

expert witness;

(c) the data or other information considered by each witness in forming the opinions;

(d) any exhibits to be used as a summary of or support for the opinions by each witness;

(e) the name, address, and curriculum vitae of each witness the State intended to qualify as 

an expert;
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(f) copies of any billing statement or invoices submitted as well as financial records of 

payments received by the witness for any services performed (including testimony) by 

the witness in response to a request of a representative of the District Attorney’s Office;

(g) any research or studies that support, as being reliable, the scientific theory and/or 

technique that the witness has or will utilize in formulating any opinions that will be a 

part of his testimony in the case;

(h) all literature supporting or rejecting the underlying theory, methodology or technique 

used or relied upon by each witness that will present opinion testimony at the trial;

(i) the results of any tests that have been performed on the science or methodology relied 

upon by each witness that will provide opinion testimony at trial;

(j) the names of each person about whom a witness to be called by the State has expressed 

an opinion in the past and the opinion expressed as to each by the State’s witness;

(k) a listing of any standards that control the technique or methodology used to arrive at any 

opinion that may be expressed at trial;

(l) the qualifications that allow the witnesses, including a list of all publications authored by 

the witness within the preceding ten years, to form and express the opinions;

(m) a list of each interview conducted by the witness while in the field in which he is to 

express an opinion;

(n) the facts in each of the cases in which he conduct those interviews;

(o) statistical research performed in the field of expertise with supporting documentation;

(p) copies of any billing statements or invoices submitted as well as financial records of 

payments received by the witness for any services performed by the witness in response 

to a request of a representative of the District Attorney’s Office from 2000 through the 

date of the trial court’s order; and 

(q) a listing of any other cases in which the witness has testified as an expert at trial or by 

deposition from 2000 through the date of the trial court’s order. 

The trial court additionally ordered that failure to comply with the order would result in the 

exclusion of the expert testimony and evidence. The State filed its petition for writ of mandamus 

requesting that we order the trial court to vacate paragraphs (b) through (q) of the discovery 

order.
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The Mandamus Standard

To be entitled to mandamus relief, the relator must show two things: (1) that he has no 

adequate remedy at law, and (2) that what he seeks to compel is a ministerial act. In re State ex 

rel. Weeks, 391 S.W.3d 117, 122 (Tex.Crim.App. 2013); State ex rel. Young v. Sixth Judicial 

District Court of Appeals, 236 S.W.3d 207, 210 (Tex.Crim.App. 2007). It is undisputed that the 

State cannot appeal the discovery order. Thus, the State has shown that it does not have an 

adequate remedy at law. 

Regarding the second element, the relator must show a clear right to the relief sought. In 

re State ex rel. Weeks, 391 S.W.3d at 122. This showing is made when the facts and 

circumstances dictate but one rational decision under “unequivocal, well-settled (i.e., from extant 

statutory, constitutional, or case law sources), and clearly controlling legal principles.” In re 

State ex rel. Weeks, 391 S.W.3d at 122, quoting Bowen v. Carnes, 343 S.W.3d 805, 810 

(Tex.Crim.App. 2011). Mandamus is not available to compel a discretionary act as distinguished 

from a ministerial act. State ex rel. Holmes v. Denson, 671 S.W.2d 896, 899 (Tex.Crim.App. 

1984). However, even a so-called “discretionary” act may become “ministerial” when the facts 

and circumstances dictate but one rational decision. In re State of Texas, 162 S.W.3d 672, 675

(Tex.App.--El Paso 2005, orig. proceeding), citing Buntion v. Harmon, 827 S.W.2d 945, 948 n.2 

(Tex.Crim.App. 1992). Mandamus relief is available to the State when a trial judge enters an

order for which he has no statutory authority to enter. State ex rel. Holmes, 671 S.W.2d at 899.

Pretrial Discovery in Criminal Cases

A criminal defendant’s constitutional right to discovery is limited to exculpatory or 

mitigating evidence in the State’s possession, custody, or control. In re State of Texas, 162 

S.W.3d at 676, citing Dickens v. Court of Appeals for the Second Supreme Judicial District, 727 
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S.W.2d 542, 551 (Tex.Crim.App. 1987). A defendant in a criminal case does not have a general 

right to discovery of evidence in the possession of the State. See Scaggs v. State, 18 S.W.3d 277, 

294-95 (Tex.App.--Austin 2000, pet. ref’d). Article 39.14 of the Code of Criminal Procedure 

provides the defendant with a limited right of discovery prior to and during trial. TEX.CODE 

CRIM.PROC.ANN. art. 39.14 (West Supp. 2012). Subsection (a) provides that upon motion of the 

defendant showing good cause, the trial court may order the State to produce certain evidence in 

the State’s possession, custody, or control. Id.; In re State of Texas, 162 S.W.3d at 676. 

Subsection (b) authorizes both the State and the defendant to file motions for the purpose of 

requesting the disclosure of the name and address of each person the other party may use at trial 

to present evidence under Rules 702, 703, and 705 of the Texas Rules of Evidence. TEX.CODE 

CRIM.PROC.ANN. art. 39.14(b). Nothing in either subsection (a) or (b) authorized the trial court 

to order the State to disclose the information required by paragraphs (b) through (q) of the 

pretrial discovery order.

Valdez argues, as he did in the trial court, that Rule 705 provided the trial court with 

discretion to enter the order. As his sole authority, he cites an unpublished opinion of the Court 

of Criminal Appeals. Lizcano v. State, No. AP-75879, 2010 WL 1817772 (Tex.Crim.App. May 

5, 2010)(not designated for publication). Unpublished opinions of the Court of Criminal 

Appeals have no precedential value and should not be cited by counsel or by a court.1 

TEX.R.APP.P. 77.3. Consequently, the trial court’s ruling cannot be supported by Lizcano. Even 

if Lizcano had been published, we would find it factually distinguishable because it did not 

concern pretrial discovery. Instead, the trial court entered an order during trial requiring the 

defense to disclose facts or data underlying the opinions of the defense experts. 

 

1

 In contrast with Rule 77.3, Rule 47.7(a) provides that opinions and memorandum opinions not designated for 

publication by the court of appeals have no precedential value but may be cited with the notation, “(not designated 

for publication).” TEX.R.APP.P. 47.7(a)(citation of unpublished opinions in criminal cases). 
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We will now examine whether the pretrial discovery order is authorized by Rules 104, 

702, 703, and 705 of the Texas Rules of Evidence. Rule 104 addresses preliminary questions of 

admissibility of evidence and provides that hearings on preliminary matters should be conducted 

outside of the hearing of the jury. TEX.R.EVID. 104. We have found no criminal cases citing 

Rule 104 as authority for a trial court to enter a discovery order like the one entered in this case.

Rule 702 allows “a witness qualified as an expert by knowledge, skill, experience, 

training, or education” to give opinion testimony based on “scientific, technical, or other 

specialized knowledge.” Leonard v. State, 385 S.W.3d 570, 581 (Tex.Crim.App. 2012), quoting

TEX.R.EVID. 702. It is well established that a trial court, upon request, must conduct a 

gatekeeping hearing under Rule 702 to determine the admissibility of opinion testimony offered 

under this rule. See Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 113 S.Ct. 

2786, 125 L.Ed.2d 469 (1993); Kelly v. State, 824 S.W.2d 568 (Tex.Crim.App. 1992). A 

Daubert/Kelly hearing may be conducted prior to trial or during trial outside of the hearing of the 

jury. In this case, Valdez has not filed a motion requesting such a hearing by means of a motion 

to exclude expert testimony or other appropriate motion. Even if he had filed a Rule 702 motion, 

the burden would be on the State to establish the admissibility of the expert testimony and we 

have not found any criminal cases holding that a trial court is authorized to enter a pretrial 

discovery order like the one entered by the court in this case. 

Rule 703 addresses the bases of opinion testimony by experts:

The facts or data in the particular case upon which an expert bases an opinion or 

inference may be those perceived by, reviewed by, or made known to the expert at 

or before the hearing. If of a type reasonably relied upon by experts in the 

particular field in forming opinions or inferences upon the subject, the facts or 

data need not be admissible in evidence.

The Court of Criminal Appeals has held that Rule 703’s use of the word “reasonably” rather than 
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“customarily” or “regularly” implies that judicial oversight was intended. Leonard, 385 S.W.3d 

at 582. Rule 705 provides as follows:

(a) Disclosure of Facts or Data. The expert may testify in terms of opinion or 

inference and give the expert’s reasons therefor without prior disclosure of the 

underlying facts or data, unless the court requires otherwise. The expert may 

in any event disclose on direct examination, or be required to disclose on 

cross-examination, the underlying facts or data.

(b) Voir dire. Prior to the expert giving the expert’s opinion or disclosing the 

underlying facts or data, a party against whom the opinion is offered upon 

request in a criminal case shall, or in a civil case may, be permitted to conduct 

a voir dire examination directed to the underlying facts or data upon which the 

opinion is based. This examination shall be conducted out of the hearing of 

the jury.

(c) Admissibility of opinion. If the court determines that the underlying facts or 

data do not provide a sufficient basis for the expert’s opinion under Rule 702 

or 703, the opinion is inadmissible.

(d) Balancing test; limiting instructions. When the underlying facts or data 

would be inadmissible in evidence, the court shall exclude the underlying 

facts or data if the danger that they will be used for a purpose other than as 

explanation or support for the expert’s opinion outweighs their value as 

explanation or support or are unfairly prejudicial. If otherwise inadmissible 

facts or data are disclosed before the jury, a limiting instruction by the court 

shall be given upon request.

Rule 705(a) authorizes a trial court to require prior disclosure of the facts and data underlying the 

expert’s opinion, but it does not state how far in advance of trial that a court may require prior 

disclosure and it does not purport to allow a trial court to enter a pretrial discovery order related 

to expert witnesses. The meaning of Rule 705(a) must be determined by examining the other 

subsections of Rule 705. Pursuant to Rule 705(b), a party is permitted to request a hearing 

outside of the presence of the jury for the purpose of conducting a voir dire examination of an 

expert witness. TEX.R.EVID. 705(b). During that hearing, the party may obtain disclosure of the 

underlying facts and data relied upon by an expert. The other subsections of Rule 705 do not 

address prior disclosure of the underlying facts and data. TEX.R.EVID. 705(c)(addressing 
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inadmissibility of the expert’s opinion if the underlying facts and data do not provide a sufficient 

basis for the opinion); TEX.R.EVID. 705(d)(providing for exclusion of the underlying facts and 

data before the jury if the evidence would be inadmissible, and providing for a limiting 

instruction if inadmissible facts or data are introduced before the jury). While the trial court is 

authorized to conduct a hearing outside of the presence of the jury under Rule 705, we do not 

interpret the rule as permitting a trial court to enter a pretrial discovery order in criminal cases. 

Even if Rule 705 authorized the trial court to order the State to disclose the underlying facts and 

data, the order entered in this case goes far beyond requiring disclosure of the facts and data as 

defined by Rule 703. We therefore conclude that the trial court clearly abused its discretion by 

entering the discovery order in this case. The issue presented in the State’s petition for writ of 

mandamus is sustained and we conditionally grant mandamus relief. The Judge of the 384th 

District Court is ordered to vacate paragraphs (b) through (q) of the pretrial discovery order 

entered on April 11, 2012 and the revised order entered on May 16, 2012 in The State of Texas v. 

Fidencio Valdez, cause number 20110D00198. The writ will issue only in the event the trial 

court fails to obey this order.

April 30, 2013

ANN CRAWFORD McCLURE, Chief Justice

Before McClure, C.J., Rivera, and Antcliff, JJ.

Antcliff, J., not participating

(Do Not Publish)