Involuntary Manslaughter (OCR A-Level Law): Revision Notes

Involuntary Manslaughter

Involuntary manslaughter is a common law offence that applies when someone causes the death of another person without the intention required for murder. While the actus reus (conduct element) mirrors that of murder—causing the death of a human being—the mens rea (mental element) is significantly lower. This offence captures situations where death results from unlawful conduct or gross negligence, rather than from a deliberate intent to kill or cause serious harm.

Unlawful act manslaughter

Unlawful act manslaughter arises when a defendant causes death through an unlawful and dangerous act. This form of manslaughter is sometimes called "constructive manslaughter" because the liability is constructed from an underlying unlawful act that results in death.

Actus reus of unlawful act manslaughter

The actus reus consists of several essential elements that must all be satisfied:

The killing must result from an act, not an omission

This requirement is fundamental. The defendant must have performed a positive act that caused death. A failure to act (an omission) cannot form the basis of unlawful act manslaughter, as established in R v Lowe (1973).

The act must be unlawful (criminal)

The defendant's conduct must constitute a criminal offence in its own right. Civil wrongs are insufficient. The underlying unlawful act could be any criminal offence, such as assault, battery, arson, or robbery, as established in R v Franklin (1883).

The act must be dangerous

The dangerousness requirement is assessed objectively. The test, established in R v Church (1965), asks whether all sober and reasonable people would inevitably recognise that the unlawful act would subject the other person to the risk of some physical harm. This is an objective standard, meaning it does not depend on what the defendant actually thought or realized.

Several key points emerge from the case law on dangerousness:

The level of harm: The risk need only be of "some harm"—it does not need to be serious harm. This is a relatively low threshold.

Objective assessment: The defendant's personal beliefs are irrelevant. In R v Ball (1989), the defendant grabbed his gun and shot what he believed were blank cartridges at the victim. The cartridge was actually live and the victim died. The Court of Appeal held that the appellant's intention, foresight, or knowledge was irrelevant to the question of dangerousness.

Assessment at the time of the act: The dangerousness is assessed based on what a reasonable person would have perceived at the time of the unlawful act, not with the benefit of hindsight.

The act must cause the death

Standard rules of causation apply. The defendant's unlawful and dangerous act must be both the factual and legal cause of death:

Factual causation: Applying the "but for" test, the victim would not have died but for the defendant's act.

Legal causation: The defendant's act must be a substantial and operating cause of death. The chain of causation must not be broken by an intervening act.

In R v Williams (1992), the court considered whether the victim's response (jumping from a moving car) broke the chain of causation, demonstrating that intervening acts by the victim can sometimes sever the causal link.

Mens rea of unlawful act manslaughter

The mens rea requirement for unlawful act manslaughter is straightforward but important to understand correctly. The prosecution must prove that the defendant had the mens rea for the underlying unlawful act. However, no additional mens rea is required regarding the death itself.

This illustrates that while the defendant need not foresee or intend the death, they must have the mens rea for whatever criminal offence forms the basis of the unlawful act. If the underlying act is assault, the defendant must have intended to cause the victim to apprehend immediate unlawful violence or been reckless as to whether they would do so.

Gross negligence manslaughter

Gross negligence manslaughter applies when death results from a defendant's grossly negligent act or omission that breaches a duty of care owed to the victim. Unlike unlawful act manslaughter, this offence can be committed by omission and does not require an underlying criminal act. However, it incorporates civil law concepts, particularly the law of negligence, to determine whether criminal liability should attach.

Development of the law

The modern law on gross negligence manslaughter derives from R v Adomako (1994), which established a four-stage test.

However, the law has developed significantly since Adomako through a series of cases between 2016 and 2019, culminating in R v Broughton (2020). In that case, the defendant supplied his girlfriend with drugs and then failed to summon medical help when she became seriously ill. She subsequently died. The Court of Appeal used this case to clarify and refine the test for gross negligence manslaughter, establishing six elements that must now be proved.

The six elements from R v Broughton (2020)

The prosecution must now prove the following six elements beyond reasonable doubt:

1. The defendant owed an existing duty of care to the victim

A duty of care must have existed at the relevant time. This is determined using principles from civil law:

General test: The test requires foreseeability of harm, proximity between the parties, and that it would be fair, just, and reasonable to impose a duty, as established in Donohue v Stevenson (1932).

Contractual duties: A duty of care can arise from a contract of employment.

2. The defendant negligently breached that duty of care

The breach of duty is assessed objectively, based on what a reasonable person would have done in the defendant's position at the time of the breach.

Standard applied: The standard is objective. An unqualified person is judged by the same standard as a qualified person. Lack of skill or experience does not lower the standard of care expected and cannot be used as a defence if the conduct is deemed negligent.

3. At the time of the breach, there was a serious and obvious risk of death

This element focuses on the nature of the risk at the time of the breach. The risk must be of death specifically, as established in R v Singh (1999).

"Serious" risk: In this context, "serious" qualifies the nature of the risk of death. It must be something much more than minimal or remote. A trivial or fanciful risk is insufficient.

"Obvious" risk: An obvious risk is one that is present, clear, and unambiguous. It should be immediately apparent, striking, and glaring rather than something that might only become apparent on further investigation. The risk should be obvious to a reasonable person observing the situation.

4. It was reasonably foreseeable at the time of the breach that the breach gave rise to a serious and obvious risk of death

This element introduces the concept of reasonable foreseeability. The key question is whether a reasonable person in the defendant's position would have foreseen that the breach of duty created a serious and obvious risk of death.

Objective test: This is an objective assessment. It does not matter whether the defendant personally appreciated the risk of death. What matters is whether the risk would have been obvious to a reasonable person in the defendant's position, as confirmed in R v DPP ex parte Jones (2000) and Attorney-General's Reference (No. 2 of 1999) (2000).

Assessment at the time: The foreseeability is assessed at the time of the breach, not with the benefit of hindsight after the death has occurred.

5. The breach of the duty caused or made a significant contribution to the death of the victim

Standard causation principles apply, but with an important qualification. The breach must have caused death or made a significant contribution to it. "Significant" means more than minimal or trivial.

6. In the view of the jury, the circumstances of the breach were truly exceptionally bad and reprehensible enough to justify criminal sanction

This final element requires the jury to make a judgment about whether the breach was sufficiently serious to warrant criminal conviction. The conduct must be so bad that it amounts to gross negligence and requires criminal punishment, not merely civil liability.

Jury assessment: This is ultimately a matter for the jury to decide. The judge should direct the jury to consider whether the defendant's behavior was grossly negligent and consequently criminal, as emphasized in R v Misra and Srivastava (2005).

Actus reus and mens rea in gross negligence manslaughter

Because gross negligence manslaughter incorporates civil law tests, the traditional distinction between actus reus and mens rea is less clear than in other offences. However, the elements can be categorized as follows:

It is important to note that gross negligence manslaughter, unlike unlawful act manslaughter, can be committed by omission where a duty of care exists.

Key cases summary