Defenses: Justification and Excuse
Defenses
Justification and Excuse
Self-defense as justification; insanity and duress as distinct excuses under their exact Texas predicates.
Structured Visual
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Scope and honesty note
Jurisdiction: Texas statutory anchors with United States and Model Penal Code doctrine explained comparatively; as of 2026-08-28; criminal statutes, defenses, charging, burdens, and precedent vary; synthetic facts are classroom inputs; not legal advice. Render structure, refuse unsupported guilt or defense conclusions, cite, abstain, and hand off.
See the essential structure first
Start with this deliberately incomplete structure, then use the pinned authorities, worked application, exceptions, and handoff below. This deliberately incomplete preview has 5 nodes; exceptions and legal consequences remain in the sourced prose below.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Begin with criminal-law doctrine
Justification and excuse answer different questions. A justification such as self-defense claims the use of force was permissible under the circumstances; Texas focuses on reasonable belief, immediate necessity, protection against unlawful force, degree of force, and statutory exclusions. An excuse accepts that conduct was not justified but asserts reduced blameworthiness under a recognized defense. Texas insanity is narrow: because of severe mental disease or defect, the actor did not know the charged conduct was wrong at that time. Duress has separate threat, compulsion, reasonable-firmness, offense-level, and self-placement rules. Mental illness alone is not the insanity defense, and competency is a different procedural issue.
Self-defense justification
The pinned provision requires a reasonable belief that force is immediately necessary to protect against another's use or attempted use of unlawful force, subject to stated limits. Verbatim statutory text: “Tex. Penal Code Sec. 9.31. SELF-DEFENSE. (a) Except as provided in Subsection (b), a person is justified in using force against another when and to the degree the actor reasonably believes the force is immediately necessary to protect the actor against the other's use or attempted use of unlawful force. The actor's belief that the force was immediately necessary as described by this subsection is presumed to be reasonable if the actor: (1) knew or had reason to believe that the person against whom the force was used: (A) unlawfully and with force entered, or was attempting to enter unlawfully and with force, the actor's occupied habitation, vehicle, or place of business or employment; (B) unlawfully and with force removed, or was attempting to remove unlawfully and with force, the actor from the actor's habitation, vehicle, or place of business or employment; or (C) was committing or attempting to commit aggravated kidnapping, murder, sexual assault, aggravated sexual assault, robbery, or aggravated robbery; (2) did not provoke the person against whom the force was used; and (3) was not otherwise engaged in criminal activity, other than a Class C misdemeanor that is a violation of a law or ordinance regulating traffic at the time the force was used. (b) The use of force against another is not justified: (1) in response to verbal provocation alone; (2) to resist an arrest or search that the actor knows is being made by a peace officer, or by a person acting in a peace officer's presence and at his direction, even though the arrest or search is unlawful, unless the resistance is justified under Subsection (c); (3) if the actor consented to the exact force used or attempted by the other; (4) if the actor provoked the other's use or attempted use of unlawful force, unless: (A) the actor abandons the encounter, or clearly communicates to the other his intent to do so reasonably believing he cannot safely abandon the encounter; and (B) the other nevertheless continues or attempts to use unlawful force against the actor; or (5) if the actor sought an explanation from or discussion with the other person concerning the actor's differences with the other person while the actor was: (A) carrying a weapon in violation of Section 46.02; or (B) possessing or transporting a weapon in violation of Section 46.05. (c) The use of force to resist an arrest or search is justified: (1) if, before the actor offers any resistance, the peace officer (or person acting at his direction) uses or attempts to use greater force than necessary to make the arrest or search; and (2) when and to the degree the actor reasonably believes the force is immediately necessary to protect himself against the peace officer's (or other person's) use or attempted use of greater force than necessary. (d) The use of deadly force is not justified under this subchapter except as provided in Sections 9.32, 9.33, and 9.34. (e) A person who has a right to be present at the location where the force is used, who has not provoked the person against whom the force is used, and who is not engaged in criminal activity at the time the force is used is not required to retreat before using force as described by this section. (f) For purposes of Subsection (a), in determining whether an actor described by Subsection (e) reasonably believed that the use of force was necessary, a finder of fact may not consider whether the actor failed to retreat.” Source: Tex. Penal Code § 9.31; https://www.neochart.com/catalog/texas/penal/chapter_9/section_9_31/tex_pe_9_31_e79e43cc7df5/tex_penal_code_sec_9_31_self_defense_0001/index.html; data via neochart.com, snapshot 2026-08.
Insanity excuse
Texas insanity requires severe mental disease or defect and lack of knowledge that the charged conduct was wrong at the time. Verbatim statutory text: “Tex. Penal Code Sec. 8.01. INSANITY. (a) It is an affirmative defense to prosecution that, at the time of the conduct charged, the actor, as a result of severe mental disease or defect, did not know that his conduct was wrong. (b) The term "mental disease or defect" does not include an abnormality manifested only by repeated criminal or otherwise antisocial conduct.” Source: Tex. Penal Code § 8.01; https://www.neochart.com/catalog/texas/penal/chapter_8/section_8_01/tex_pe_8_01_87792717a371/tex_penal_code_sec_8_01_insanity_0001/index.html; data via neochart.com, snapshot 2026-08.
Duress excuse
The pinned duress provision states compulsion, threat, reasonable-firmness, offense-level, and self-placement rules. Verbatim statutory text: “Tex. Penal Code Sec. 8.05. DURESS. (a) It is an affirmative defense to prosecution that the actor engaged in the proscribed conduct because he was compelled to do so by threat of imminent death or serious bodily injury to himself or another. (b) In a prosecution for an offense that does not constitute a felony, it is an affirmative defense to prosecution that the actor engaged in the proscribed conduct because he was compelled to do so by force or threat of force. (c) Compulsion within the meaning of this section exists only if the force or threat of force would render a person of reasonable firmness incapable of resisting the pressure. (d) The defense provided by this section is unavailable if the actor intentionally, knowingly, or recklessly placed himself in a situation in which it was probable that he would be subjected to compulsion. (e) It is no defense that a person acted at the command or persuasion of his spouse, unless he acted under compulsion that would establish a defense under this section.” Source: Tex. Penal Code § 8.05; https://www.neochart.com/catalog/texas/penal/chapter_8/section_8_05/tex_pe_8_05_395f2b42674f/tex_penal_code_sec_8_05_duress_0001/index.html; data via neochart.com, snapshot 2026-08.
Pin the synthetic facts
Three synthetic defense packets separately record a confrontation, a severe mental condition at the charged time, and a coercive threat. Sources, timing, capability, alternatives, expert limits, contrary facts, and burdens remain visible.
Work the element application
The self-defense branch identifies unlawful force, reasonable belief, immediate necessity, proportional degree, provocation, statutory exclusions, and retreat treatment without deciding reasonableness automatically. The insanity branch asks exactly whether severe disease or defect caused lack of knowledge that conduct was wrong at the charged time. The duress branch applies the correct felony or nonfelony threat rule, reasonable firmness, causation, and self-placement limitation.
Read the populated offense record
The defense matrix contains defense type, offense, conduct, triggering facts, timing, reasonable belief, necessity, force degree, severe disease or defect, knowledge of wrongfulness, threat, imminence, reasonable firmness, self-placement, burden, contrary proof, and human-review status. The record contains 14 populated rows.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Read the complete record
The complete record keeps sources, stated facts, and questions for review separate. Pinned sources: Verbatim snapshot authority. Tex. Penal Code § 9.31: Self-defense justification. Tex. Penal Code § 8.01: Insanity excuse. Tex. Penal Code § 8.05: Duress excuse. Synthetic facts: Classroom facts only. Force scenario: Person uses nondeadly force during a rapidly changing confrontation; video and witness timing conflict. Mental-condition scenario: Clinical records address a severe disorder and knowledge of wrongfulness at the charged time. Threat scenario: Messages threaten immediate serious injury unless a delivery is made; safe alternatives and self-placement are disputed. Element trace: Questions, evidence pointers, and bounded comparisons. Justification: The act is claimed permissible in context: unlawful force, reasonable belief, immediate necessity, degree, provocation, exclusions, retreat rule, burden. Insanity excuse: Severe mental disease or defect, charged time, and whether the actor did not know the conduct was wrong. Duress excuse: Offense grade, force or threat, imminence where required, protected person, reasonable firmness, causal compulsion, self-placement, burden. Separation: Failure of an offense element, justification, excuse, procedural competency, mitigation, and sentencing are different issues.
Narrow summary
Keep justification, insanity, duress, element failure, competency, and mitigation distinct, and apply each defense's exact predicates and burden.