Memorandum Opinion by Justice Goldstein, 05-25-00787-CR, January 29, 2026.
On appeal from the 422nd Judicial District Court of Kaufman County, Texas.
Synopsis
The Dallas Court of Appeals affirmed a murder conviction, holding that a defendant is not entitled to a self-defense jury instruction absent evidence that they reasonably believed force was “immediately necessary” at the time it was deployed. The Court clarified that general knowledge of a victim’s history of being armed or a prior altercation earlier in the day is insufficient to satisfy the statutory requirement of an imminent threat.
Relevance to Family Law
While Lancaster arises from a criminal prosecution, its holding is a critical strategic tool for family law litigators handling protective orders, temporary injunctions, and custody disputes involving allegations of domestic violence. In Texas, the “self-defense” justification is frequently invoked to mitigate or excuse conduct that would otherwise constitute family violence. This case reinforces a strict “immediacy” standard, providing authority to exclude or defeat self-defense claims in family court when the alleged threat is based on a party’s reputation or past behavior rather than a contemporaneous overt act.
Case Summary
Fact Summary
Wendell Lancaster was indicted for the murder of Breanna Mendosa. The evidence at trial established that Lancaster and Mendosa were involved in a dispute earlier in the day. Lancaster testified that while he was driving Mendosa to a restaurant, she stole his wallet, assaulted him, and threatened him with both a gun and a knife. However, following this initial altercation, the parties separated; Mendosa returned to her home, and Lancaster went to his own residence to “rest.”
Later that day, Lancaster chose to return to Mendosa’s residence to demand the return of his wallet. He testified that after knocking repeatedly, the front door “fell off,” and he stepped inside. Lancaster admitted that he did not see Mendosa with a weapon during this final encounter, but claimed he “knew she was armed before” and that “she had [the gun] in the car the whole trip back.” Lancaster testified that a police siren in the distance made him “nervous,” at which point he shot and killed Mendosa. He then requested a jury instruction on self-defense, which the trial court denied.
Issues Decided
Whether the trial court committed reversible error by refusing to include a self-defense instruction in the jury charge when the defendant provided testimony regarding the victim’s prior violent acts and the defendant’s general belief that the victim was armed.
Rules Applied
The Court applied Texas Penal Code § 9.31 and § 9.32, which dictate that a person is justified in using force—and specifically deadly force—only when they reasonably believe such force is “immediately necessary” to protect against another’s use or attempted use of unlawful force. Under Texas law, a defendant is entitled to a jury instruction on an affirmative defense only if there is some evidence, from any source, that raises the issue. However, the “immediate necessity” requirement is a mandatory prerequisite; evidence of a general fear or a threat that has passed is legally insufficient to raise the issue of self-defense.
Application
The Dallas Court of Appeals focused its analysis on the temporal gap between the initial dispute in the car and the shooting at Mendosa’s home. The court noted that Lancaster had reached a place of safety at his own home before deciding to re-initiate contact with the victim. The court emphasized that even if Mendosa had been armed earlier in the day, Lancaster’s own testimony confirmed that he did not see a weapon at the time of the shooting. The court rejected the notion that Lancaster’s subjective “nervousness” or his knowledge of Mendosa’s past behavior created a legal justification for force. Because there was no evidence of an overt act or an immediate threat from Mendosa at the moment the trigger was pulled, the court found that the “immediacy” required by the Penal Code was entirely absent.
Holding
The Court of Appeals held that the trial court properly denied the requested self-defense instruction. The court reasoned that a defendant’s belief that force is necessary must be based on an immediate threat, not a prior one.
The court further held that a victim’s reputation for being armed or a defendant’s prior knowledge of the victim’s weapon possession does not, standing alone, authorize the use of deadly force if no threat exists at the time of the encounter. The conviction was affirmed.
Practical Application
For the family law practitioner, Lancaster serves as a gatekeeping authority. When a spouse or parent attempts to justify an assault or a violation of a protective order by arguing they “knew” the other party was dangerous or “feared” what might happen based on the other party’s history, Lancaster provides the basis for an objection. In a bench trial or a hearing on a protective order, this case allows counsel to argue that testimony regarding the victim’s violent character is irrelevant to a self-defense claim unless tied to a specific, contemporaneous act of aggression.
Checklists
Defending Against a Self-Defense Claim in Custody/Family Violence Litigation
- Establish the “Safe Haven”: Use discovery to prove the party claiming self-defense had reached a position of safety (e.g., their own car, home, or a different room) before the force occurred.
- Audit the Timeline: Identify the “cool-down period” between any alleged provocation and the use of force.
- Pin Down the “Overt Act”: Cross-examine the opposing party to admit they did not see a weapon or an immediate gesture of violence at the exact moment they reacted.
- Exclude Character Evidence: Move to exclude general testimony about a client’s “reputation for violence” if the opposing party cannot show an immediate threat.
Evaluating Self-Defense for a Protective Order Respondent
- Identify the Immediacy: Can the client point to a specific movement or threat made seconds before the reaction?
- Document Presence of Weapons: Was the applicant actually brandishing a weapon, or is the client relying on “prior knowledge” (which Lancaster suggests is insufficient)?
- Analyze Re-initiation: Did the client return to the scene or seek out the applicant after the initial conflict ended?
Citation
Lancaster v. State, No. 05-25-00787-CR (Tex. App.—Dallas Jan. 29, 2026, no pet. h.) (mem. op.).
Full Opinion
Family Law Crossover
In Texas divorce and custody litigation, this ruling can be weaponized to neutralize the “he/she made me do it” defense. Under Texas Family Code § 153.004, a finding of family violence creates a rebuttable presumption against joint managing conservatorship. Opposing parties often attempt to avoid this by claiming their violence was a “defensive” reaction to a toxic or dangerous partner. Lancaster clarifies that “preemptive” strikes are not “self-defense.” If a parent leaves a conflict, cools down, and then returns to engage—even if they believe the other parent is “armed and dangerous”—any force they use will likely be classified as family violence, not self-defense. Use this case in trial briefs to ensure that “history of the parties” does not overshadow the “immediacy” of the act in question.
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