Written by attorneys · grounded in primary & secondary sources — see below
The killing of one person by another. At common law, homicide falls into three categories: justifiable when the law expressly authorizes the act, excusable when a recognized defense eliminates liability, and criminal when the killing is unlawful and falls outside those protections. Under the Model Penal Code, criminal homicide occurs when a person purposely, knowingly, recklessly, or negligently causes the death of another human being.
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How it applies
Common Examples
6
Self-Defense Shooting Classified
Henry Hoffman confronted an armed intruder in his home and fired a single shot that killed the intruder. The state charged Hoffman with criminal homicide. Because the killing occurred under circumstances the law expressly authorized as self-defense, the court classified it as justifiable homicide and dismissed the charge.
Victim Peacefulness Evidence Admitted
Hana Huang was charged with murdering a man she claimed had attacked her first. The defense introduced evidence that the victim had a reputation for violence. The prosecutor then offered testimony that the victim was known for peacefulness in the community. The court admitted the evidence to rebut the first-aggressor claim.
Reckless Driving Causes Death
Heidi Henderson drove at high speed through a residential neighborhood while intoxicated and struck a pedestrian who later died. The state charged her under the Model Penal Code. Because she consciously disregarded a substantial and unjustifiable risk of death, the jury convicted her of criminal homicide.
Juvenile Nonhomicide Sentence Barred
Hope Howard, age sixteen, robbed a store without using a weapon and caused no physical injury. A court sentenced her to life without parole. On appeal the sentence was vacated because the Eighth Amendment prohibits life without parole for a juvenile convicted of a non-homicide offense.
Intentional Stabbing With Malice
Hilda Hernandez argued with a coworker and then retrieved a knife from a drawer. She returned and deliberately stabbed the coworker in the chest, causing death. Because no justification or mitigation applied, the court found malice aforethought and convicted her of murder rather than manslaughter.
Dying Declaration About Attack
Hannah Hughes was stabbed during a robbery and told responding officers that her attacker was a specific neighbor before she died minutes later. At trial the prosecutor offered the statement. The court admitted it as a dying declaration because the victim believed her death was imminent and spoke about the cause of her injuries.
Common questions
Frequently Asked
6
How does common law classify homicide into justifiable, excusable, and criminal categories?+
At common law, justifiable homicide covers killings the law expressly authorizes. Excusable homicide applies when a recognized defense eliminates criminal liability. Criminal homicide includes all other unlawful killings that lack justification or excuse.
What mental states satisfy criminal homicide under the Model Penal Code?+
A person commits criminal homicide by purposely, knowingly, recklessly, or negligently causing the death of another human being. The Code then classifies the offense as murder, manslaughter, or negligent homicide depending on the mental state and circumstances.
When may a prosecutor introduce evidence of a homicide victim's peacefulness?
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In a homicide case the prosecutor may offer evidence of the victim's trait of peacefulness to rebut defense evidence that the victim was the first aggressor. The rule permits this rebuttal even though character evidence is generally restricted.
Does the Eighth Amendment bar life without parole for juveniles convicted of non-homicide offenses?+
Yes. The Eighth Amendment categorically prohibits sentencing a juvenile offender to life imprisonment without parole for a non-homicide offense because the penalty is cruel and unusual when applied to minors in such cases.
What is the common-law year-and-a-day rule for homicide liability?+
At common law a defendant could be held liable for homicide only if the victim died within one year and one day of the injury. Death after that period barred a homicide charge even if causation was otherwise established.
When is a dying declaration admissible in a homicide prosecution?+
A statement is admissible under the dying-declaration exception when the declarant, believing death to be imminent, makes the statement about the cause or circumstances of the impending death. The rule applies in homicide prosecutions and civil cases.
homicide
victims in the United States are killed by their spouses. Mercy & Saltzman, Fatal Violence Among Spouses in the United States, 1976-85, 79 Am. J. Public Health 595 (1989). Thirty percent of…
Criminal Law & ProcedureHomicide · Unintended killingsUBEIntermediate