Notes · LawUK · A-Levels

General Elements of Criminal Liability

This topic establishes the building blocks of every criminal offence: the actus reus (including liability for omissions), causation, and the mens rea (intention, recklessness and negligence). It also covers the rules of transferred malice and coincidence and the exceptional category of strict liability offences.

5 sections~21 min reading time3 competenciesLevel Standard 3 · Advanced 2

T·0888 / 16

Exam profile

AO1 · Demonstrate knowledge and understanding of actus reus, causation, mens rea and strict liabilityAO2 · Apply the general elements of liability to the facts of a criminal scenario to reach a reasoned conclusionAO3 · Analyse and evaluate the rules on omissions, causation and strict liability

Operators:explainapplyanalyseevaluateadvise

basic level

AS students should be able to define actus reus and mens rea and apply the but-for test of factual causation.

higher level

Full A-Level answers apply the full chain of causation, distinguish direct and oblique intention, and evaluate the imposition of strict liability.

Depth

Text

Contents · 5 sections

General Elements of Criminal Liability

Actus reus and liability for omissions#

StandardAQA 7162/1 - Criminal liabilityDfE GCE Law subject content

When an omission is an actus reus

Fig. 1A failure to act is an actus reus only where one of these duties to act exists.

The actus reus is the physical element of an offence - the guilty act. It may consist of conduct (the act of doing something), a consequence (a result the conduct must cause, as in the death required for homicide), or a state of affairs or circumstance. The actus reus must be voluntary: a person is not criminally liable for a movement that is not willed. Generally the actus reus requires a positive act, and the criminal law does not impose liability for a mere failure to act, reflecting the principle that people are not usually their neighbour's keeper.

There are, however, established exceptions in which an omission (a failure to act) can amount to the actus reus, where the defendant was under a legal duty to act. A duty may arise from statute, where an Act expressly imposes a duty to act (for example duties under road-traffic legislation). A duty may arise from contract, as in R v Pittwood (1902), where a railway crossing-keeper who failed to close the gate, causing a fatal accident, was convicted because his contract obliged him to act. A duty may arise from a special relationship, as in R v Gibbins and Proctor (1918), where a father and his partner were guilty of murder for starving his child, to whom a duty of care was owed.

A duty may also arise from the voluntary assumption of responsibility for another, as in R v Stone and Dobinson (1977), where the defendants who had taken in and undertaken to care for a sick relative were liable for gross negligence manslaughter when they failed to summon help. A duty arises where the defendant creates a dangerous situation and then fails to take reasonable steps to counteract it, as in R v Miller (1983), where a squatter who accidentally started a fire and did nothing to put it out was liable for the resulting damage. A duty may arise from holding a public office, as in R v Dytham (1979), where a police officer who stood by while a man was beaten to death was guilty of misconduct in office.

For evaluation, the omissions rule is debated. The 'conventional' English position - liability only where a specific duty exists - respects individual autonomy and avoids the difficulty of defining a general duty to rescue, but it can permit a bystander to let another die with impunity, which some regard as morally unacceptable and argue should be replaced by a 'Good Samaritan' duty of easy rescue. A strong answer identifies the correct duty situation on the facts and can evaluate whether the law on omissions is satisfactory.

Worked example

Worked problem question: liability for an omission

D, a lifeguard on duty under his contract, fails to rescue a swimmer in difficulty who then drowns. Advise on whether D can be criminally liable for the omission.

Issue
Whether D's failure to act can constitute the actus reus of a homicide offence.
Rule / authority
An omission is an actus reus only where D is under a legal duty to act. A duty may arise from contract (R v Pittwood (1902)) or from the voluntary assumption of responsibility (R v Stone and Dobinson (1977)).
Application
As a lifeguard on duty, D owes a contractual duty to protect swimmers, so his failure to rescue is capable of forming the actus reus on the Pittwood principle. If the necessary mens rea (or gross negligence) and causation are present, the omission can ground liability.
Conclusion
D can be criminally liable because his contractual duty brings his omission within an established duty situation.

Result: The answer identifies the correct duty situation with authority and applies it to establish that the omission can be an actus reus.

Typical mistakes

Assuming a general duty to act; liability for an omission arises only in the recognised duty situations.
Confusing the duty situations - for example citing Miller (creating a danger) for a case that really concerns a special relationship.

Active revision

D sees a stranger drowning in a shallow pond and does nothing, though he could easily have helped. The stranger dies. Advise on D's criminal liability.

Active recall

Recall the key points — then reveal.

Sources: GCE AS and A level subject content for law (Department for Education) · AQA A-level Law (7162) specification (AQA)

Causation#

AdvancedAQA 7162/1 - Criminal liabilityDfE GCE Law subject content

The chain of causation

Fig. 2The prosecution must prove factual and legal causation with no novus actus breaking the chain.

Where an offence requires a consequence, the prosecution must prove that the defendant caused it. Causation has two limbs. Factual causation is established by the 'but for' test: but for the defendant's conduct, would the result have occurred? In R v White (1910) the defendant put poison in his mother's drink, but she died of an unrelated heart attack before it took effect; but for his act she would have died anyway, so he did not cause the death (though he was liable for attempted murder). In R v Pagett (1983), by contrast, where the defendant used his pregnant girlfriend as a human shield and she was shot by police, but-for causation was satisfied.

Factual causation is necessary but not sufficient; the prosecution must also prove legal causation - that the defendant's conduct was an operative and substantial cause of the result. The contribution must be more than minimal (de minimis), though it need not be the sole or main cause. In R v Smith (1959) a stabbed soldier died after poor medical treatment, but the stab wound was still an operative and substantial cause, so the chain of causation held. The thin-skull rule requires the defendant to take the victim as found: in R v Blaue (1975) the defendant remained liable for the death of a victim who, being a Jehovah's Witness, refused a blood transfusion, because the defendant must take the victim's characteristics, including religious beliefs, as they are.

The chain of causation may be broken by a new and intervening act (novus actus interveniens) that is sufficiently independent and serious to relieve the defendant of liability. Negligent medical treatment rarely breaks the chain: in R v Cheshire (1991) the defendant remained liable despite negligent treatment because his acts still contributed significantly to the death, whereas in the exceptional case of R v Jordan (1956) 'palpably wrong' treatment, when the original wound had healed, did break the chain. The victim's own act breaks the chain only if it is not reasonably foreseeable; in R v Roberts (1971) a victim who jumped from a moving car to escape the defendant's advances did not break the chain because her reaction was foreseeable, a principle confirmed in R v Williams (1992).

For evaluation, the causation rules are generally regarded as fair, holding defendants responsible for the natural consequences of their acts while allowing genuinely independent events to relieve them. But the thin-skull rule can seem harsh, making a defendant liable for an unusually serious outcome, and the reluctance to allow medical negligence to break the chain has been criticised. A strong answer works methodically through factual and then legal causation, tests for any novus actus, and reaches a reasoned conclusion.

Worked example

Worked problem question: causation and an intervening act

D stabs V, who is taken to hospital and given negligent but not grossly wrong treatment, and dies. Advise on whether D caused V's death.

Issue
Whether D's stabbing is the legal cause of death, or whether the negligent treatment breaks the chain of causation.
Rule / authority
Factual causation: but for the stabbing, V would not have died (R v White). Legal causation: the wound must be an operative and substantial cause (R v Smith). Negligent medical treatment breaks the chain only if palpably wrong so that the original wound is no longer operative (R v Jordan), which is rare (R v Cheshire).
Application
But for the stabbing V would not have needed treatment, so factual causation is satisfied. The stab wound remains an operative and substantial cause; ordinary negligent treatment does not break the chain on the Cheshire principle, unlike the exceptional facts of Jordan.
Conclusion
D is the legal cause of V's death; the negligent treatment does not break the chain of causation.

Result: The answer applies both limbs of causation in order and correctly analyses the intervening medical treatment.

Typical mistakes

Stopping at factual causation; legal causation (operative and substantial cause) must also be established.
Assuming negligent medical treatment breaks the chain; it rarely does (Cheshire) unless it is palpably wrong and the original wound is no longer operative (Jordan).

Active revision

D stabs V. On the way to hospital the ambulance crashes and V dies. Advise on whether D caused V's death.

Active recall

Recall the key points — then reveal.

Sources: GCE AS and A level subject content for law (Department for Education) · AQA A-level Law (7162) specification (AQA)

Mens rea: intention, recklessness and negligence#

StandardAQA 7162/1 - Criminal liabilityDfE GCE Law subject content

Forms of mens rea

Fig. 3Offences require different levels of fault, from intention down to negligence.

Mens rea is the mental element of an offence - the guilty mind that, with the actus reus, makes conduct criminal. The highest form is intention. Direct intention exists where the defendant's aim or purpose is to bring about the result; it is the defendant's decision to produce the prohibited consequence (R v Mohan (1976) described intent as a decision to bring about the prohibited consequence). Oblique (indirect) intention arises where the result is not the defendant's purpose but is a virtually certain consequence of their actions: in R v Woollin (1999) the House of Lords held that a jury may find intention where the result was a virtual certainty and the defendant appreciated that it was, building on R v Nedrick (1986). Oblique intention is a matter the jury may find, not a legal definition of intention.

Recklessness is a lower form of mens rea: the defendant foresees a risk of the prohibited result and unjustifiably goes on to take it. The test is subjective - it depends on what this defendant actually foresaw. In R v Cunningham (1957) the defendant who tore a gas meter from a wall, causing gas to leak, was reckless only if he foresaw the risk of harm. The subjective test was temporarily displaced by an objective test in R v Caldwell (1982), but the House of Lords restored the subjective test in R v G and another (2003), overruling Caldwell and holding that a defendant (there, two young boys) is reckless only if they themselves foresaw the risk, so that a purely objective standard was inappropriate for criminal liability.

Negligence, the lowest fault standard, involves falling below the standard of the reasonable person; it is objective and features in only a limited range of criminal offences, most importantly gross negligence manslaughter. Different offences require different levels of mens rea, and the required mens rea must be proved for each: murder requires intention to kill or cause grievous bodily harm, section 20 of the Offences Against the Person Act 1861 requires intention or recklessness as to some harm, and many statutory offences specify their own mental element.

For evaluation, the return to a subjective test of recklessness in R v G is generally welcomed as consistent with the principle that criminal liability should be based on the defendant's actual state of mind, though it means a defendant who genuinely fails to foresee an obvious risk escapes liability. A strong answer identifies the precise mens rea required by the offence in issue and applies the correct test - direct or oblique intention, or subjective recklessness - to the facts.

Worked example

Worked problem question: oblique intention

D sets fire to a building to frighten the occupants, foreseeing that their death or serious injury is virtually certain. An occupant dies. Advise on whether D had the mens rea for murder.

Issue
Whether D intended to kill or cause grievous bodily harm where death was not his purpose.
Rule / authority
Murder requires intention to kill or cause GBH. Direct intention is purpose; oblique intention allows a jury to find intention where the result was a virtual certainty and D appreciated that (R v Woollin (1999)).
Application
D's purpose was to frighten, not to kill, so there is no direct intention. But if death or serious injury was a virtual certainty and D appreciated that, the jury is entitled to find that D intended it, on the Woollin principle.
Conclusion
The jury may find that D had the oblique intention required for murder, because D foresaw death or GBH as a virtual certainty.

Result: The answer distinguishes direct from oblique intention and applies the Woollin virtual-certainty test to the facts.

Typical mistakes

Treating oblique intention (virtual certainty foreseen) as a definition of intention rather than something the jury may find.
Applying an objective test of recklessness; R v G (2003) overruled Caldwell and restored the subjective Cunningham test.

Active revision

D throws a heavy object from a tall building into a busy street, not wanting to hurt anyone but aware someone below is almost certain to be hit. Advise on D's mens rea if a passer-by is killed.

Active recall

Recall the key points — then reveal.

Sources: GCE AS and A level subject content for law (Department for Education) · AQA A-level Law (7162) specification (AQA)

Transferred malice and coincidence#

StandardAQA 7162/1 - Criminal liabilityDfE GCE Law subject content

Two rules ensure that the actus reus and mens rea are properly connected. The doctrine of transferred malice provides that where a defendant, with the mens rea for an offence, causes the actus reus of the same offence against a different victim, the malice (the mens rea) is transferred to the actual victim. In R v Latimer (1886) the defendant aimed a blow with his belt at one person but struck and injured another; his intention to strike was transferred to the actual victim, so he was liable. The malice can only transfer between the same kind of offence: in R v Pembliton (1874) the defendant threw a stone intending to hit people but instead broke a window; his intention to cause personal injury could not be transferred to the different offence of criminal damage, so he was not liable for that offence.

The rule of coincidence (or contemporaneity) requires that the actus reus and mens rea exist at the same time. The courts have interpreted this flexibly so as to avoid a defendant escaping liability on a technicality. Under the continuing-act theory, where the actus reus is a continuing act, it is enough that the defendant forms the mens rea at some point while it continues: in Fagan v Metropolitan Police Commissioner (1969) the defendant accidentally drove onto a police officer's foot and then, realising, refused to move; the actus reus of battery continued while he had the mens rea, so the two coincided.

Under the single-transaction theory, a series of acts may be treated as one continuing transaction, so that mens rea present at some point in the sequence coincides with the actus reus even if the fatal act itself was done without it. In Thabo Meli v R (1954) the defendants beat a man intending to kill him, believed him dead, and rolled him over a cliff; he in fact died from exposure at the foot of the cliff. The court held that the whole course of conduct was a single transaction, so the mens rea present at the start coincided with the actus reus that caused death. R v Church (1966) applied the same reasoning.

For evaluation, both rules are sensible devices for aligning fault and harm. Transferred malice is criticised as a legal fiction, and it does not work where the offences differ (Pembliton), but it prevents a defendant escaping liability merely because the wrong person was harmed. The flexible approach to coincidence is generally welcomed as preventing defendants from exploiting the precise timing of their acts. A strong answer identifies which rule is engaged and applies it accurately to the facts.

Worked example

Worked problem question: coincidence of actus reus and mens rea

D attacks V intending to kill him and, believing V dead, dumps the body; V in fact dies later from the disposal. Advise on whether the mens rea and actus reus coincide.

Issue
Whether D can be liable for murder when the act that caused death was done believing the victim already dead.
Rule / authority
Actus reus and mens rea must coincide, but a series of acts may be treated as a single transaction, so mens rea at the start coincides with the actus reus that causes death (Thabo Meli v R (1954); R v Church).
Application
D formed the intention to kill at the outset. Although the fatal act (the disposal) was done believing V dead, the attack and the disposal are one continuing transaction, so the mens rea coincides with the actus reus on the Thabo Meli principle.
Conclusion
The coincidence requirement is satisfied through the single-transaction approach, so D can be liable for murder.

Result: The answer identifies the coincidence problem and resolves it with the single-transaction authority.

Typical mistakes

Transferring malice between different offences; malice transfers only within the same offence (Pembliton).
Concluding there is no liability because the mens rea and the fatal act did not exactly coincide, without considering the continuing-act or single-transaction approaches.

Active revision

D punches V intending to injure him; the punch misses V and knocks over a lamp, starting a fire. Advise on D's liability using transferred malice.

Active recall

Recall the key points — then reveal.

Sources: GCE AS and A level subject content for law (Department for Education) · AQA A-level Law (7162) specification (AQA)

Strict liability#

AdvancedAQA 7162/1 - Criminal liabilityDfE GCE Law subject content

Proving a crime

Fig. 4Most offences require actus reus and mens rea together; strict liability offences dispense with mens rea.

Strict liability offences are exceptions to the general requirement of mens rea: liability is imposed without proof of any mens rea as to at least one element of the actus reus. They are almost always statutory and typically regulatory in character - offences concerning food safety, pollution, road traffic, and the sale of age-restricted goods - designed to protect the public and to promote high standards of care by those who carry on regulated activities. In Alphacell Ltd v Woodward (1972) a company was convicted of causing polluted matter to enter a river without any need to prove fault, and in Harrow London Borough Council v Shah (1999) a shopkeeper was convicted of selling a lottery ticket to a person under sixteen even though he neither knew nor was reckless as to the buyer's age.

Because strict liability departs from the fault principle, the courts start from a presumption that mens rea is required. In Sweet v Parsley (1970) the House of Lords quashed the conviction of a landlady for being concerned in the management of premises used for smoking cannabis, holding that the presumption of mens rea applied because she did not know of the use. The Privy Council in Gammon (Hong Kong) Ltd v Attorney-General of Hong Kong (1985) set out the factors that determine whether the presumption is displaced: the presumption is strongest for 'truly criminal' offences and weaker for regulatory ones; it can be displaced only where the statute is concerned with an issue of social concern, such as public safety; and strict liability should be imposed only where it will actually be effective in promoting greater vigilance to prevent the prohibited harm.

The justification for strict liability is that it protects the public, sets high standards for regulated activities, is easier and cheaper to enforce because the prosecution need not prove a state of mind, and encourages those in a position to prevent harm to take great care. In many such offences a 'due diligence' defence is provided by the statute, softening the strictness by allowing a defendant who took all reasonable precautions to escape liability.

For evaluation, strict liability is controversial. Its supporters emphasise public protection and enforcement efficiency; its critics argue that convicting a person who was not at fault offends the principle that the criminal law should punish only the blameworthy, may be ineffective where the defendant could not have prevented the harm, and can damage the reputation of a person who has done their best. A strong answer weighs the public-protection rationale against the fault principle, using the Gammon factors and cases such as Sweet v Parsley and Harrow LBC v Shah, and reaches a reasoned view on whether strict liability is justified.

Worked example

Model evaluation-essay plan: is strict liability justified?

Plan an essay evaluating the imposition of strict liability.

Thesis
Argue that strict liability is justified for regulatory offences protecting the public but is harder to defend the closer an offence comes to being truly criminal.
Rule / authority
Explain strict liability, the presumption of mens rea (Sweet v Parsley (1970)) and the Gammon (1985) factors; give examples (Harrow LBC v Shah; Alphacell v Woodward).
Application
Show strict liability at work in regulatory contexts and the softening effect of due-diligence defences.
Evaluation
Weigh public protection, high standards and enforcement efficiency against the punishment of the blameless and possible ineffectiveness.
Conclusion
Conclude that strict liability is justified for genuinely regulatory offences of social concern but not where it would convict a faultless defendant of a truly criminal offence.

Result: The plan uses the Gammon factors and key cases to reach a reasoned, qualified verdict.

Typical mistakes

Assuming any offence with no mens rea stated is automatically strict; the presumption of mens rea (Sweet v Parsley) must first be considered.
Ignoring the Gammon factors when arguing whether the presumption is displaced.

Active revision

'Strict liability offences are unjustifiable because they punish people who are not at fault.' Analyse and evaluate this statement.

Active recall

Recall the key points — then reveal.

Sources: GCE AS and A level subject content for law (Department for Education) · AQA A-level Law (7162) specification (AQA)

References & sources

Sources

Department for Education

GCE AS and A level subject content for law

AQA

AQA A-level Law (7162) specification

General Elements of Criminal Liability

5 sections~21 min reading time3 competenciesLevel Standard 3 · Advanced 2

General Elements of Criminal Liability

Key points

Worked problem question: liability for an omission

Key points

Worked problem question: causation and an intervening act

Key points

Worked problem question: oblique intention

Key points

Worked problem question: coincidence of actus reus and mens rea

Key points

Model evaluation-essay plan: is strict liability justified?

Sources

General Elements of Criminal Liability

Key points

Worked problem question: liability for an omission

Key points

Worked problem question: causation and an intervening act

Key points

Worked problem question: oblique intention

Key points

Worked problem question: coincidence of actus reus and mens rea

Key points

Model evaluation-essay plan: is strict liability justified?

Sources