H418/01 - Murder

Unlawful killing of a human being

Murder is the unlawful killing of a human being under the King's peace with an intention to kill or cause really serious bodily harm.

The traditional definition refers to a person of sound mind and discretion unlawfully killing a reasonable creature in being under the sovereign's peace with malice aforethought. Translate that language into elements rather than treating it as a requirement to prove hatred or advance planning. The killing supplies the actus reus, the external elements of the offence. The relevant intention supplies the mens rea, its mental element. Murder is principally a common-law offence: its definition has developed through binding decisions rather than one comprehensive statutory definition.

The victim must be a human being born alive. A fetus in the womb is not itself a murder victim, although injuries before birth can cause the death of a child after a live birth and raise separate questions about causation and intention. A person remains protected regardless of age, disability or terminal illness. Consent to being killed and a compassionate motive do not make an intentional killing lawful.

“Under the King's peace” covers ordinary civilian life and is not restricted to British citizens or British victims. It excludes lawful killing of an enemy in the course of war; it does not provide a general excuse for killings committed during a war. “Unlawful” matters too. A killing justified by lawful self-defence does not satisfy this requirement. Self-defence is a complete defence, whereas the partial defences studied later reduce murder to manslaughter.

Original example: Jo deliberately administers a fatal poison at a terminally ill friend's request. The friend's wish and Jo's compassion explain the motive, but do not remove the unlawful killing or intention. By contrast, death following properly justified defensive force raises a different legal question: whether the killing was unlawful at all.

Conduct and causation

The prosecution must connect the defendant's conduct to the victim's death; finding a dead victim and a violent defendant is not enough.

A positive act, such as stabbing or poisoning, can cause death. A failure to act can also do so where a recognised legal duty requires action, for example a parent's duty to a child. The prosecution must prove the duty, the relevant failure and the causal connection. A stranger who merely witnesses danger does not automatically have the same duty as a parent or someone who created the danger. An intentional failure to provide essential care can therefore be murder, but only if all the offence's requirements, including intention, are proved.

Factual causation asks whether the victim would have died as and when they did but for the defendant's conduct. Legal causation asks whether that conduct remained a sufficiently significant cause of death. It need not be the sole or main cause. A pre-existing vulnerability does not generally excuse the attacker: the defendant takes the victim as found. Treatment, another person's intervention or the victim's response requires careful analysis rather than an automatic assumption that it breaks the chain.

There is no current requirement that the victim die within a year and a day of the injury: section 1 Law Reform (Year and a Day Rule) Act 1996 abolished that old restriction. Causation must still be proved. Section 2 requires the Attorney General's consent to prosecution for a fatal offence where the injury was sustained more than three years before death, or the defendant has already been convicted of an offence committed in circumstances connected with the death. That is a procedural safeguard, not an automatic finding that a delayed death was unrelated.

In R v Cheshire (1991) the victim died after medical complications following a shooting. The Court of Appeal explained that negligent treatment does not normally break causation; the treatment must be so independent of the defendant's conduct and so potent in causing death that the original contribution becomes insignificant. This is a demanding boundary, not a rule that medical treatment can never break a chain.

Original application: Lina deliberately shoots Omar in the abdomen. Omar dies from complications of treatment of that wound. The shooting is a factual cause if the treatment and death would not otherwise have occurred, and it can remain a significant legal cause despite poor care. If independent medical evidence instead shows an unrelated, overwhelming cause which made the wound insignificant, that is a credible challenge to legal causation. A reasoned answer identifies what the medical evidence must establish.

Intention to kill or cause serious harm

Murder requires an intention to kill or to cause grievous bodily harm, meaning really serious bodily harm.

An intention to cause serious harm is sufficient even if death was neither wanted nor foreseen. R v Cunningham (1982) confirmed this rule. The defendant repeatedly struck the victim with a chair; the House of Lords rejected the argument that murder required an intention to kill. The important proposition is the sufficiency of intent to cause really serious injury, not the particular object used.

Direct intention exists where killing or serious injury is the defendant's purpose. A person aiming to break the victim's legs may possess the intent for murder if the attack causes death, despite saying, truthfully, “I wanted him to survive.” Conversely, an intention to cause a minor bruise does not become intention to cause serious harm merely because the victim unexpectedly dies. Another homicide offence may apply, but murder's mental element must be proved independently.

Motive is the reason for acting. Intention concerns the consequence the defendant means to bring about. Mercy, profit, jealousy or revenge may provide evidence, but proof of a particular motive is not required. Malice aforethought does not require malice in the everyday sense or a long period of planning: an intention formed immediately before the fatal act can suffice.

Recklessness means taking a relevant risk rather than necessarily intending its result. Awareness that death is possible, or even highly likely, is not by itself murder's intention. Do not use the victim's death retrospectively to establish what the defendant intended earlier. The prosecution bears the burden of making the jury sure of the necessary intention.

Inferring intention from the evidence

Where death or serious injury was not the defendant's purpose, the jury may still find intention from the circumstances, but risk-taking and intention must remain distinct.

Under section 8 Criminal Justice Act 1967, a court or jury is not bound to infer intention merely because a consequence was natural and probable. It decides what the defendant intended or foresaw from all the evidence, drawing proper inferences. This combines statutory direction with case-law interpretation: the reasonable person's foresight is not automatically the accused's actual state of mind.

In R v Woollin (1998) a father threw his infant onto a hard surface, causing death. The trial direction allowed intention to be found from awareness of a substantial risk of serious injury. The House of Lords held that this set the threshold too low and substituted manslaughter. In the exceptional case needing an extended intention direction, the jury must be sure that death or serious bodily harm was a virtual certainty, barring an unforeseen intervention, and that the defendant appreciated that fact. It may then find the necessary intention. This is permission to find intention from evidence, not a compulsory conclusion that every foreseen consequence was intended.

Original comparison: Farah destroys a sealed occupied cabin to erase records. If serious injury to its occupant is virtually certain and Farah appreciates that, lack of a wish to hurt the occupant does not settle intention. Compare a fire in an apparently empty shed where Farah foresees only a possibility of someone entering. That risk alone does not satisfy the Woollin direction, although other evidence could still prove a direct intention.

This boundary protects the distinction between murder and manslaughter. Yet the serious-harm rule means murder does not require foresight of death itself. A reasoned criticism is that the label and mandatory life sentence can cover defendants with different intentions concerning death. The counterargument is that intentionally inflicting really serious injury creates culpability sufficiently grave to justify liability for a resulting death. Neither argument changes the present rule. Explain the rule before evaluating its consequences, and support a judgment with the actual difference between intended injury and intended death.

Quick recap

Establish an unlawful human killing and causation, then prove intention to kill or cause really serious harm. Motive, advance planning, the fact of death and awareness of a mere risk are not substitutes for that intention.