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March 17, 2026 Get Citation Alerts Download PDF Add Note

Ruben Castillo, Jr v. the State of Texas

Texas Court of Appeals, 7th District (Amarillo)

• Citations: None known
• Docket Number: 07-25-00074-CR
• Nature of Suit: Aggravated Assault

• Disposition: Affirmed

• Opinion

• Authorities (13)

• Cited By (0)

• Summaries (0)

• Similar Cases (14.3K)

• PDF

Disposition

Affirmed

Lead Opinion

In The
Court of Appeals
Seventh District of Texas at Amarillo

No. 07-25-00074-CR

RUBEN CASTILLO, JR, APPELLANT

V.

THE STATE OF TEXAS, APPELLEE

On Appeal from the 137th District Court
Lubbock County, Texas
Trial Court No. DC-2022-CR-1887, Honorable John J. “Trey” McClendon III, Presiding

March 17, 2026
MEMORANDUM OPINION
Before PARKER, C.J., and DOSS and YARBROUGH, JJ.

Appellant, Ruben Castillo, Jr., appeals from his conviction for aggravated assault

with a deadly weapon causing serious bodily injury to a household member.1 The jury

sentenced him to sixty years of confinement. By a single issue, Appellant contends the

trial court erred by admitting expert testimony that lacked a reliable foundation. We affirm.

1 See TEX. PENAL CODE § 22.02(a), (b)(1)(A).
BACKGROUND

A grand jury indicted Appellant for intentionally causing serious bodily injury to his

nineteen-month-old stepdaughter, A.O., by burning her with hot water, a deadly weapon.

Dr. John Griswold, the Medical Director of University Medical Center’s Burn Center,

testified that A.O. suffered third- and fourth-degree burns over roughly forty percent of her

body. Law enforcement measured the water temperature from Appellant’s tap at 158

degrees Fahrenheit. Dr. Griswold described the injuries as consistent with a scald burn

caused by hot liquid.

Dr. Griswold opined that A.O. was held in the hot water for at least several minutes,

an act he characterized as intentional. Dr. Griswold did not believe A.O.’s injuries were

consistent with Appellant’s account to law enforcement. According to Appellant, he was

bathing the child in the sink, stepped away to retrieve a towel, heard her screaming after

about twenty seconds, and returned to find her struggling against scalding water from the

faucet.

On appeal, Appellant challenges the admission of Dr. Griswold’s testimony

regarding the time necessary to produce burns of such severity.

STANDARD OF REVIEW & APPLICABLE LAW

We review evidentiary rulings for an abuse of discretion. Rhomer v. State, 569

S.W.3d 664, 669 (Tex. Crim. App. 2019). A trial court abuses its discretion when it acts

without reference to guiding principles or acts arbitrarily or unreasonably. Id.

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To preserve error, a party must make a timely objection stating the grounds with

sufficient specificity to alert the trial court to the complaint. TEX. R. APP. P. 33.1(a)(1)(A).

A general objection preserves error only if the legal basis is obvious to the court and

opposing counsel. Gonzalez v. State, 616 S.W.3d 585, 591 (Tex. Crim. App. 2020). No

magic words are required, but the objection must be clear enough to afford the court an

opportunity to address and correct the alleged error. Pena v. State, 353 S.W.3d 797, 807

(Tex. Crim. App. 2011). The appellate argument must comport with the specific objection

made at trial. Wilson v. State, 71 S.W.3d 346, 349 (Tex. Crim. App. 2002).

Three requirements govern the admission of expert testimony: the witness must

be qualified by knowledge, skill, experience, training, or education (qualification); the

subject matter must be appropriate for expert testimony (reliability); and the testimony

must assist the factfinder (relevance). Vela v. State, 209 S.W.3d 128, 131 (Tex. Crim.

App. 2006); Rhomer, 569 S.W.3d at 669. Here, Appellant concedes that Dr. Griswold

was qualified and that his testimony was relevant. Only the reliability of Dr. Griswold’s

opinion is challenged.

ANALYSIS

An expert’s opinion is inadmissible as unreliable if the underlying facts or data do

not provide a sufficient basis for it. TEX. R. EVID. 705(c). During a hearing outside the

jury’s presence, Dr. Griswold explained that the sharp demarcation between A.O.’s

burned and unburned skin indicated intentional, rather than accidental, injury. When

asked how long A.O. would have had to be held under the water to suffer such severe

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burns, Dr. Griswold opined she would have been submerged for several minutes at least.

He based this opinion on the water temperature and the depth of the burns, explaining

that burns extending into muscle tissue, particularly in the chest area, take time to

develop. Dr. Griswold also noted that accidental burns tend to produce varying degrees

of injury rather than uniformly third- and fourth-degree burns.

Appellant cross-examined Dr. Griswold about the scientific literature on scald

burns. Dr. Griswold acknowledged that the available studies are industrial rather than

clinical, adding, “I can’t tell you much more than that.” When asked whether he based his

opinion on any particular study, Dr. Griswold responded that he relied on teachings from

burn centers based on those industrial studies. Appellant presented Dr. Griswold with

two studies on time and temperature for scald burns that differed from his opinion. Dr.

Griswold explained that his opinion is based in large part on his personal experience.

At the conclusion of the hearing, Appellant objected: “Judge, at this point, we’ll

object to him talking about the time and temperature just due to failure to lay a proper

predicate.” The trial court overruled the objection. Immediately before Dr. Griswold

testified to the jury, Appellant requested a running objection on the same basis. It is Dr.

Griswold’s testimony about the time required to inflict A.O.’s injuries that Appellant now

challenges.

1. No Preservation Via Specific Objection

We hold that Appellant failed to preserve error regarding the reliability of Dr.

Griswold’s testimony via a specific objection. A “predicate” objection, in evidence

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parlance, typically refers to the foundational requirements for admitting exhibits such as

physical evidence, recordings, photographs, or documentary exhibits. See Harris v.

State, 565 S.W.2d 66, 69 (Tex. Crim. App. 1978); S.D.G. v. State, 936 S.W.2d 371, 381

(Tex. App.—Houston [14th Dist.] 1996, writ denied).

Challenges to expert testimony, by contrast, are framed in terms of qualifications,

reliability, or relevance. See Vela, 209 S.W.3d at 131. In Teixeira v. State, which involved

a challenge to expert testimony, our sister court noted that an objection to “improper

predicate” fails to preserve error because it does not inform the trial court exactly how the

evidence is deficient. 89 S.W.3d 190, 192 (Tex. App.—Texarkana 2002, pet. ref’d). The

Court of Criminal Appeals has applied this same approach to other complaints about

evidence admissibility. See e.g., Bird v. State, 692 S.W.2d 65, 70 (Tex. Crim. App. 1985)

(en banc) (holding objection to improper predicate did not preserve chain-of-custody

issue); Harris, 565 S.W.2d at 70 (same; no preservation of challenge to admission of

recording); Boss v. State, 489 S.W.2d 582, 584 (Tex. Crim. App. 1972) (same; challenge

to admission of exhibits).

Counsel’s complaint that the State “fail[ed] to lay a proper predicate” did not

communicate with sufficient clarity a complaint that Appellant intended to challenge the

reliability of Dr. Griswold’s methodology or the relevance of his testimony. Accordingly,

we hold the objection was not sufficiently specific to preserve the argument Appellant now

advances on appeal. TEX. R. APP. P. 33.1(a).

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2. Reliability of Testimony

Nevertheless, even assuming Appellant preserved error, we hold the trial court did

not abuse its discretion in permitting Dr. Griswold’s testimony.

In assessing the scientific reliability of an expert opinion, courts consider several

factors, including the extent to which the underlying theory is accepted in the relevant

scientific community, the qualifications and experience of the expert, the existence of

supporting or rejecting literature, the potential rate of error, the availability of other experts

to evaluate the technique, the clarity with which the theory can be explained, and the

experience and skill of the person applying the technique. Kelly v. State, 824 S.W.2d

568, 573 (Tex. Crim. App. 1992). These factors are nonexclusive. The trial court’s

gatekeeping function does not supplant cross-examination as the traditional means of

attacking otherwise admissible evidence. Wolfe v. State, 509 S.W.3d 325, 336 (Tex.

Crim. App. 2017).

The Court of Criminal Appeals’ application of the Kelly factors in Wolfe v. State is

instructive. There, three physicians testified that a seven-month-old child’s injuries were

inflicted intentionally rather than accidentally. 509 S.W.3d at 329–33. The Court

examined the Kelly factors and found no abuse of discretion in admitting the testimony,

emphasizing that all three experts based their opinions on medical school training and

clinical experience treating pediatric head trauma. Id. at 336–37.

Dr. Griswold’s testimony rests on a similar foundation. He has served as Medical

Director of the Burn Center for thirty-two years, has authored over 250 publications on

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burns, and serves as a tenured professor at Texas Tech Health Sciences Center. The

center admits over 1,000 burn patients annually, roughly forty percent of whom are

children under ten. His opinion rested on his training at verified burn centers affiliated

with the American Burn Association and on his extensive clinical experience. Although

Dr. Griswold acknowledged that clinical literature on scald-burn timing is limited and could

not specify a rate of error, his methodology found support from another expert. Dr.

Jennifer Hansen, a physician board-certified in general pediatrics and child abuse

pediatrics, testified that her training on burns focuses on pattern recognition. She

described two general types of scald burns: splash or flow burns, which produce irregular

patterns, and immersion or submersion burns, which produce uniform patterns with clear

demarcation lines. Dr. Hansen concluded that A.O.’s burns were consistent with

immersion rather than splash and determined that A.O.’s injuries were consistent with

nonaccidental trauma. Several of our sister courts have admitted similar testimony. See

Peterson v. State, 137 S.W.3d 739, 744 (Tex. App.—Houston [1st Dist.] 2004, pet. ref’d);

McCann v. State, 695 S.W.2d 791, 792 (Tex. App.—Texarkana 1985, no pet.).

Weighing the Kelly factors, we conclude the trial court did not abuse its discretion

in permitting the testimony. The lack of clinical literature and the absence of a defined

rate of error may weigh against admission, but Dr. Griswold’s extensive qualifications, the

acceptance of his methodology among burn specialists, corroboration from Dr. Hansen,

and the clarity of his explanation support the trial court’s ruling. Appellant was afforded

the opportunity to vigorously cross-examine Dr. Griswold, and the jury was free to assess

the weight of his testimony. Wolfe, 509 S.W.3d at 336.

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We overrule Appellant’s sole issue.

CONCLUSION

Having overruled Appellant’s issue on appeal, we affirm the judgment of the trial

court.

Lawrence M. Doss
Justice

Do not publish.

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