R v Malcherek

Facts

Malcherek stabbed his estranged wife and she was taken to hospital. Following surgery she suffered further complications and was placed on a life-support machine. Doctors carried out accepted tests that showed her brain stem was dead and the ventilator was then switched off. Malcherek was convicted of murder. His appeal was heard together with that of Steel, who had struck a woman about the head and whose victim was also taken off a ventilator after brain stem death was diagnosed.

History

Convicted of murder at the Crown Court. Appealed to the Court of Appeal (Criminal Division) on the ground that the withdrawal of ventilation broke the chain of causation.

Issue

Whether the doctors' decision to switch off the ventilator, after tests showed brain stem death, broke the chain of causation between the defendant's original attack and the victim's death.

Held

Appeal dismissed. Conviction for murder upheld.

Ratio

• Where the victim's death follows from the defendant's original injury and doctors, applying accepted medical tests, switch off life-support because the brain stem is dead, the doctors' act does not break the chain of causation and the defendant's act remains an operating and substantial cause of death. The court did not need to lay down a general legal definition of death.

The judgments

Key reasoning

• The court held that the doctors' decision to switch off the ventilator, taken after accepted tests, did not alter the fact that the original injury was the operating cause of death, so it was unnecessary to decide when death occurs in law.
• Doctors who withdraw life support in accordance with accepted medical practice after the patient's condition has been tested do not thereby break the chain of causation; the underlying injury caused by the defendant continues to operate as the cause of death.
• The original assault inflicted by the defendant remained the operating and substantial cause of death, satisfying the causation requirement for murder.

Where it fits in the module

This case is a cornerstone of Topic 1 (Basic Principles) on causation and the definition of death. It directly informs the debate on when death occurs and how medical interventions affect legal causation, linking to Smith [1959] (operating and substantial cause), Jordan [1956] (palpably wrong treatment), Cheshire [1991] (treatment not breaking causation unless independent), and Airedale NHS Trust v Bland [1993] (withdrawal of treatment from PVS patients). It also underpins the act/omission distinction in medical contexts.

Criticisms

• The distinction between withdrawing treatment (an omission) and active killing remains analytically fragile, especially when the treatment is the only thing sustaining bodily functions.
• The operating and substantial cause test provides limited guidance in borderline cases where medical decisions are made in good faith but may be negligent or premature.
• Later developments in Bland and the Mental Capacity Act 2005 shifted focus toward best-interests decision-making rather than a strict binary definition of death, creating tension with Malcherek's rigid formulation.