Every criminal offence under Nigerian law is made up of certain essential components which the prosecution must prove before an accused person can be convicted. These components are known as the elements of crime.Without establishing these elements, no offence can be said to exist in law.
This principle is deeply rooted in criminal law and was strongly affirmed in the historic case of Woolmington v. DPP (1935) AC 462, which laid the foundation that the prosecution bears the burden of proof beyond reasonable doubt.
In criminal jurisprudence, the two major elements of a crime are:
1.Actus Reus (The Guilty Act)
2.Mens Rea (The Guilty Mind)
However, other supporting elements such as concurrence, causation, and absence of defence also play key roles in determining criminal liability.
In this note, we shall focus mainly on the actus reus and mens rea as the core elements of crime under Nigerian Criminal Law.
Criminal Law in Nigeria: The Legal Foundation
In Nigeria, the foundation of criminal law rests on two main statutes:
.The Criminal Code Act (Cap C38 LFN 2004) – applicable in the Southern states of Nigeria.
.The Penal Code Act – applicable in the Northern states of Nigeria.
Both codes are derived from English common law, which historically shaped Nigeria’s legal system.To fully understand the elements of a crime, it is necessary to examine both statutory provisions and judicial authorities that define these legal concepts.
1. Actus Reus (The Guilty Act) The Physical Element of Crime.
Actus Reus refers to the physical or external element of a crime the conduct or act prohibited by law. It includes every element of the offence except the mental state of the accused. In simple terms, it is what the accused did or failed to do that the law regards as criminal.
For instance, under Section 316 of the Criminal Code, murder is defined as the unlawful killing of another person with intent to cause death or grievous harm.Here, the unlawful killing constitutes the actus reus. Without the actual act of killing, there can be no murder, regardless of the accused’s intent.
Forms of Actus Reus.
The actus reus may arise from:
An act — such as striking or shooting another person.
An omission — failure to act when under a legal duty to do so.For example, a parent neglecting to feed a child leading to the child’s death.
Important: Where a crime is defined as a strict liability offence, the issue of mens rea (mental element) does not arise. What matters is simply proving the commission or omission of the act.
Legal Duty and Omissions
Omissions are punishable only when there is a legal duty to act.Such duty may arise from:
Statute,Contract,Relationship,Voluntary assumption of care, or
Creation of a dangerous situation.
For example, a lifeguard who fails to rescue a drowning person under his care can be held criminally liable because his position imposes a legal duty to act.
2. Mens Rea (The Guilty Mind) The Mental Element of Crime
The Latin phrase mens rea literally means “a guilty mind.”It refers to the mental state, intention, knowledge, recklessness, or negligence with which a criminal act is committed.
According to Glazebrook,
“Mens rea is the blameworthy condition of the mind that makes a person criminally responsible.”
Judicial Authorities on Mens Rea.
R v. Prince (1875) LR 2 CCR 154:The court held that mens rea is a necessary ingredient in every offence unless expressly excluded by statute.
Sherras v. De Rutzen (1895) 1 QB 918:Wright J stated that there is a presumption that mens rea, or knowledge of the wrongfulness of the act, is essential in every offence.
R v. Tolson (1889) 23 QBD 168:The court emphasized that no person should be convicted unless the act was accompanied by a guilty mind.
Nigerian courts have adopted this same principle, stressing that criminal liability requires both a prohibited act and a guilty mind.
Types and Levels of Mens Rea in Criminal Law
Different offences require different mental states. There is no single definition of mens rea because the mental element varies by offence.
However, the main recognized forms of mens rea are:
1. Intention
Intention is defined as the volitional act performed with knowledge of itscircumstances and a desire to achieve its consequences.
In Hyam v. DPP (1974):
Mrs. Hyam poured petrol through a letterbox and ignited it, knowing people were asleep inside.
The House of Lords held that foresight of death or grievous harm as a probable consequence was enough to establish intention.
R v. Moloney (1985):
The House of Lords ruled that foresight of serious harm does not automatically mean intent, refining the legal meaning of intention in murder cases.
R v. Woollin (1999):
The court held that a result is intended if it is a virtually certain consequence and the defendant appreciates that.
Ubani v. The State:
The Supreme Court held that where the accused inflicted severe assault resulting in death, it was intentional with knowledge that death or grievous harm was a probable result.
Idiok v. The State:
The Court of Appeal affirmed that to succeed in a charge of murder, the prosecution must prove intention to cause death or grievous harm.
2. RECKLESSNESS.
Recklessness means consciously taking an unjustifiable risk despite being aware of it.The person does not desire the consequence but takes the risk anyway.
Key Cases:
R v. Cunningham (1957):
Lord Byrne stated that a person is reckless if they foresee a risk that their actions could cause harm and still proceed.
R v. Caldwell (1982):
The court held that a defendant could be guilty even if they did not foresee the risk, provided it was obvious to a reasonable person.
R v. Lamb (1967):
Established that recklessness involves a gross disregard for the risk.
3. NEGLIGENCE.
Negligence is the failure to exercise reasonable care, resulting in unintended harm.
While recklessness involves conscious risk-taking, negligence involves unconscious or careless disregard of the risk.
Negligence is not primarily a criminal law concept it is more common in civil law, as seen in Donoghue v Stevenson. However, in criminal law, it may occasionally form a basis for liability where gross negligence results in death or injury.
In summary, the elements of crime actus reus and mens rea form the foundation of criminal liability in Nigeria.For any conviction to stand, both the guilty act and the guilty mind must be proven beyond reasonable doubt.
This principle not only safeguards justice but also ensures that innocent persons are not punished for acts devoid of criminal intent.
Understanding these elements is fundamental for every law student, legal scholar, and practitioner in Nigeria’s criminal justice system.
YOU MAY ALSO CHECK
HISTORY & SOURCES OF CRIMINAL LAW IN NIGERIA
PARTIES TO AN OFFENCE UNDER NIGERIAN CRIMINAL LAW (section 7)
Parties to an Offence under Section 7 of Nigerian Criminal Law with Judicial Pronouncements
R v Bangaza (1960) 5 FSC 1 Key Facts, Legal Principles & Nigerian Case Analysis
