Understanding the Legal Framework of Murder
The fundamental concept of murder is established through Lord John Coke's classic definition, emphasizing the elements of actus reus in murder cases and mental state requirements.
Definition: Murder is defined as "the unlawful killing of a reasonable person in being and under the kings (or Queens) peace with malice aforethought, express or implied."
Highlight: Murder carries a mandatory life sentence and is classified as a common law offense rather than a statutory one.
The actus reus (physical elements) of murder comprises several essential components:
- The defendant must cause death through action or omission
- The victim must be a reasonable creature in being
- The killing must occur under the queen's peace
- The act must be unlawful
Example: In the case of Attorney-General's Reference (No3 of 1994) (1997), it was established that a foetus is not considered a 'reasonable person in being', and therefore its death cannot constitute murder.
Vocabulary: 'Reasonable creature in being' refers specifically to a living human being with independent existence from the mother.
The case law demonstrates important principles:
- Malcherek 1981 addressed the complexities of determining death in medical contexts
- Causation must be both factual and legal
- No intervening acts should break the chain of causation
Highlight: Understanding malice aforethought in criminal law is crucial, as it encompasses both express intention to kill and implied intention to cause grievous bodily harm.



