Gustavo Bouvier Hernandez A/K/A Gustavo Bovier-Hernandez v. the State of Texas

Texas Court of Appeals, 4th District (San Antonio)·Decided February 25, 2026·No. 04-24-00162-CR·Published

Opinion

Fourth Court of Appeals

San Antonio, Texas

MEMORANDUM OPINION

No. 04-24-00162-CR

Gustavo Bouvier HERNANDEZ a/k/a Gustavo Bovier-Hernandez, Appellant

v.

The STATE of Texas,

Appellee

From the 111th Judicial District Court, Webb County, Texas Trial Court No. 2021CRD001242D2 Honorable Monica Z. Notzon, Judge Presiding

Opinion by: Lori Massey Brissette, Justice

Sitting: Irene Rios, Justice Lori Massey Brissette, Justice Adrian A. Spears II, Justice

Delivered and Filed: February 25, 2026 AFFIRMED Following a jury trial, appellant Gustavo Bouvier Hernandez 1 was convicted of aggravated sexual assault of a child pursuant to Texas Penal Code section 22.021(a)(2)(B) and possession of child pornography pursuant to Texas Penal Code section 43.26(a). See TEX. PEN. CODE §§ 22.021(a)(2)(B), 43.26(a). On appeal, Bouvier contends the trial court erred in: (1) denying his

1 In the trial record, appellant is also referred to as “Gustavo Bouvier-Hernandez” or “Gustavo Bovier-Hernandez.” These spelling variations are immaterial to this appeal. See Martin v. State, 541 S.W.2d 605, 606 (Tex. Crim. App. 1976).

request for a jury instruction on a mistake of fact; (2) admitting improper opinion testimony; (3) denying his motion to suppress his oral custodial statements; and (4) not providing a required jury instruction on whether his oral custodial statements were involuntary. After reviewing the record and the parties’ briefing, we affirm.

BACKGROUND

In August of 2021, Bouvier’s wife discovered an explicit video on his cell phone of Bouvier performing a sexual act on an eight-year-old child who is his wife’s sister and their adoptive daughter. The video is over a minute and a half long and captures Bouvier penetrating the child’s mouth with his penis and giving her verbal instructions. After finding the video, Bouvier’s wife called the police. Bouvier was arrested, and a Webb County grand jury returned a two-count indictment charging him with aggravated sexual assault of a child (Count I) and possession with intent to promote child pornography (Count II). The indictment was amended by court order, changing Count II to possession of child pornography under Texas Penal Code section 43.26(a).

Before the jury trial, a two-day hearing was held on Bouvier’s motion to suppress his oral statements made during a custodial interrogation conducted by Investigator Donna in which Bouvier confessed to the sexual act but asserted he had believed the child victim was his adult wife. At the conclusion of the hearing, the trial court denied the motion to suppress, and it issued written findings of fact and conclusions of law.

At trial, the State presented five witnesses, including Investigator Donna and Bouvier’s wife. The sexually explicit video was entered into evidence and viewed by the jury. Bouvier’s wife testified that the child victim can be heard saying “no” in the video. She also testified that she knows Bouvier is the man in the video because she has been married to Bouvier for over fifteen years and she recognized his penis and voice in the video. She further testified that after

discovering the video, she spoke with the child victim, who made an outcry to her that Bouvier had sexually assaulted her two prior times. At trial, Bouvier testified, confessing that he engaged in the sexual act with the child and filmed it on his phone, but stating that throughout the entire recording he had believed the victim was his adult wife. Bouvier acknowledged that he had the phone’s flashlight on throughout the recording, and he further acknowledged that he can be heard in the video giving the child instructions.

The jury found Bouvier guilty on both counts of the indictment, and the jury assessed as punishment stacked sentences of eighty years for Count I and ten years for Count II, along with a $10,000 fine for each count. Bouvier timely appealed.

REQUEST FOR MISTAKE-OF-FACT JURY INSTRUCTION At the jury charge conference, Bouvier requested a jury instruction for Count I, aggravated sexual assault of a child, which stated that if the jury finds from the evidence that Bouvier “reasonably believed that the act of penetrating the mouth of [the child] was a mistake of fact in that he believed [the child] was his wife” then the jury “will acquit” Bouvier. Bouvier contends that the trial court’s denial of his request for a mistake-of-fact jury instruction constitutes reversible error.

Under Texas Penal Code section 8.02, it is a defense to prosecution that a defendant formed a reasonable mistaken belief only if “his mistaken belief negated the kind of culpability required for commission of the offense.” TEX. PEN. CODE § 8.02(a); see Mays v. State, 318 S.W.3d 368, 382 (Tex. Crim. App. 2010) (explaining that mistake-of-fact defense does not apply unless defendant was mistaken about a specific historical fact that, if true, would negate the mental state required for conviction). The trial court properly denied Bouvier’s request for this instruction because the purported mistake of fact does not negate any mental state required for conviction. A

person commits the offense of aggravated sexual assault of a child if, (1) “regardless of whether the person knows the age of the child at the time of the offense,” intentionally or knowingly “causes the penetration of the mouth of a child by the sexual organ of the actor” or “causes the mouth of a child to contact” the sexual organ of the actor; and (2) “the victim is younger than 14 years of age, regardless of whether the person knows the age of the victim at the time of the offense.” TEX. PEN. CODE § 22.021(a). “Because Section 22.021 requires no culpability as to the age of the victim, there is nothing for the defendant’s mistaken belief to negate, and his mistake cannot be a defense to prosecution.” Fleming v. State, 455 S.W.3d 577, 582 (Tex. Crim. App. 2014) (citing TEX. PEN. CODE § 8.02(a)). The Fleming court further concluded that section 22.021 is not unconstitutional for failing to recognize an affirmative defense based on a defendant’s belief that the victim was 17 years of age or older. Id. at 583; see Arias v. State, 503 S.W.3d 523, 530 (Tex. App.—San Antonio 2016, pet. ref’d).

Bouvier’s argument—that he mistakenly believed his conduct was lawful because he believed the victim was his wife—does not entitle him to a mistake-of-fact jury instruction. See Fleming, 455 S.W.3d at 582–83; Miller v. State, 605 S.W.3d 877, 882 (Tex. App.—Houston [1st Dist.] 2020, pet. ref’d) (“A defendant’s mistaken belief that his conduct was lawful is not a mistake of fact” and does not require a jury instruction). Therefore, the trial court did not err by denying Bouvier’s request for this instruction. We overrule Bouvier’s first issue.

ADMISSION OF INVESTIGATOR’S TESTIMONY In his second issue, Bouvier argues the trial court erred in permitting improper opinion testimony from Investigator Donna as to the truthfulness of Bouvier’s mistake-of-fact defense. The State contends Bouvier failed to preserve this issue.

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