Applicability of McNaughton’s Rules in IPC

Defendants in a Criminal trial often aim to dispute the concept of Mens Rea, which refers to a person’s mental state during the commission of a crime.

They do so by asserting the defence of ‘insanity.’ If the court accepts this defence, it clears the accused of any criminal responsibility they may face. In India, the rationale behind the Insanity defence is derived from the ‘McNaughton rule’ and is included in Section 84 of the Indian Penal Code, 1860

Origin of Insanity as a Defence

The concept of ‘insanity’ as a legal defence originated from the case of R v Arnold (1724). This case led to the establishment of the ‘Wild Beast Test,’ which assessed whether the accused had the mental capacity to understand the nature of their actions and distinguish between ‘good’ and ‘bad.’

Another test called the ‘Insane Delusion Test’ was developed in the case of R v Hadfield (1800) to achieve the same purpose. However, both tests proved to be arbitrary and ineffective in determining insanity.

The pivotal case of R v McNaughton (1843) introduced the ‘Right and Wrong Test‘ under what is now known as ‘McNaughton’s Rule,’ truly establishing ‘insanity’ as a defence. In this case, Daniel McNaughton, a woodworker from Glasgow, Scotland, attempted to assassinate the British Prime Minister, Sir Robert Peel, mistakenly believing that the Troy Political Party was targeting him.

Instead, he fatally shot Edward Drummond, the Prime Minister’s Secretary, whom he mistook for the Prime Minister. During the trial, McNaughton’s attorney argued that he had a delusional mental disorder, which rendered him incapable of forming the necessary intent for murder. As a result, the jury found McNaughton not guilty.

This verdict laid the foundation for the legal definition of ‘insanity’ and established the principles of ‘McNaughton’s Rule,’ which include:

• Presumption of sanity: Unless proven otherwise, all individuals are considered sane and possess reasoning capabilities.
• Defect of reason: It must be demonstrated that the accused was operating under a defect of reason at the time of the act.
• Lack of knowledge: The accused must be shown to be unaware of the nature and qualities of their actions.

These principles formed the basis for evaluating the defence of insanity in subsequent criminal trials.

What is Mc Naughton’s Rule?

McNaughton’s Rule, also known as the M’Naghten Rule, is a legal test used to determine the criminal responsibility of an individual based on their mental state at the time of the offence. It originated from the landmark British case R v. McNaughton in 1843.

According to McNaughton’s Rule, a person can be found not guilty because of insanity if, at the time of committing the act, they had a mental disorder that rendered them:

• Unable to understand the nature and quality of their actions: They were incapable of comprehending the nature of the act they were committing or the consequences that could arise from it.
• Unaware that what they were doing was wrong: They could not distinguish between right and wrong due to their mental condition, and thus, they genuinely believed that their actions were morally justified or in accordance with the law.

Under McNaughton’s Rule, the burden of proof rests with the defence to establish the presence of a mental disorder that meets the criteria outlined above. If the defence can successfully prove that the accused meets the Rule’s requirements, they may be acquitted on the grounds of insanity.

Applicability of The Mc Naughton’s Rule in India

In India, the defence of insanity is recognised under Section 84 of the Indian Penal Code. This section allows an accused person of an unsound mind to escape criminal responsibility. It states that an act is not considered an offence if the person, due to unsoundness of mind at the time of committing the act, was incapable of understanding the nature of the act or that it was wrong or contrary to the law. 

This section follows the basic principles of criminal jurisprudence, such as the maxim “Actus Facit Reum Nisi Mens Sit Rea,” which means that an act does not make someone guilty unless they had a criminal intention or committed the act with a guilty mind.

Therefore, if an offence is committed by an individual proven to be of unsound mind, it is assumed that the accused lacked mindfulness, rational thinking or a guilty intention to commit the crime. Consequently, the accused is not held liable for any criminal liability.

Section 84 is similar to the M’Naghten rules, with a subtle distinction between the two. According to the M’Naghten rules, a person is presumed to be sane unless proven otherwise. The act must result from a defect of reason caused by a “disease of the mind,” with the person unaware of the crime’s nature and quality.

In Section 84, the term “quality” is not specified and the phrase “contrary to law” is not included as in the M’Naghten rules. Many Indian courts have interpreted Section 84 of the Indian Penal Code in accordance with the principles established in the M’Naghten case.

The case of Hazara Singh v The State introduced the concept of “furious nulla voluntas est,” which means that a madman has no will. Here, a madman was interpreted as a mentally ill person. However, not all individuals with mental disorders can automatically claim this defence. In Bapu v The State of Rajasthan, the court clarified that it is “legal insanity” that needs to be proven, not “medical insanity.”

Subsequent legal developments have emphasised that mere eccentricity of mind, which many criminals possess, does not qualify as unsoundness of mind. What needs to be established is the cognitive impairment of the accused that made them unable to comprehend the wrongful nature of their actions.

In Dulal Naik v State (1987), McNaughton’s Rule was interpreted alongside Section 105 of the Indian Evidence Act, which states that the courts presume a person to be sane and in full control of their faculties unless proven otherwise. Additionally, the burden of proof lies with the accused. It is also important to note that unsoundness of mind before or after committing the offence does not qualify as a defence of insanity. It must be present during the offence itself.

Landmark Judgements Related to Mc Naughton’s Rule under IPC

Amrit Bhushan v. Union of India

In the case of Amrit Bhushan v. Union of India (1976), the Supreme Court clarified that the M’Naghten rules define and explain the term “insanity” of the accused, while Section 84 of the Indian Penal Code describes “unsound mind,” which is considered equivalent to insanity.

This step was taken by the drafters of the Indian Penal Code to provide a broader interpretation of the term “unstable mind” and also recognised the concept of non-compos mentis (not in one’s right mind) as a defence of insanity under criminal law. To claim the defence under Section 84, certain essential elements must be fulfilled:

• The accused’s mind should be incapable of being aware of the nature of the act.
• The act should be contrary to the law.
• The act should be morally wrong.

To establish the insanity or unsound mind of the defendant, it must be demonstrated that their cognitive abilities were impaired to the extent that they did not know the nature of their actions or the consequences thereof.

Emerciano Lemos v. State 

In the case of Emerciano Lemos v. State (1969), the accused slit open a person’s throat while experiencing hallucinations and having an unbalanced mind. Despite having knowledge of the nature or quality of the act and understanding that it was wrong, the accused did not refrain from committing it. Therefore, the accused could not invoke the defence of insanity under Section 84 of the Indian Penal Code.

The court prescribed a test of responsibility to be applied when an accused pleads unsound mind under Section 84. This test aimed to determine the criminality of the act. This case also affirmed that the M’Naghten rules are the fundamental source of Section 84 of the Indian Penal Code, as both contain similar provisions.

Criticism of the M’Naghten rule

The M’Naghten rules have faced various challenges due to their limited and outdated legal definition. From a medical perspective, these rules have been criticised as misleading and obsolete. For example, they allow for the compulsory hospitalisation of an individual who may not be medically insane. According to the European Convention on Human Rights, an individual should only be hospitalised or detained with proper medical expertise. This principle has also been adopted in English law through the Human Rights Act of 1998.

There are certain illnesses, such as diabetes or epilepsy, that can lead to temporary episodes of insanity. Still, they are not recognised by the law and do not fall within the scope of the defence of insanity. This discrepancy highlights a gap between the legal and medical perspectives.

Criticism has also been directed at the rules for their limited ability to determine whether a defendant threatens public safety. Additionally, it can be challenging to distinguish between temporary and permanent insanity, further complicating the application of these rules.

There have been debates about the rules being too lenient, allowing defendants with serious mental illnesses to be discharged from their criminal liability regardless of the level of disorder caused by their actions. This raises concerns about accountability and public safety.

Overall, the M’Naghten rules have been criticised for their insufficient and outdated nature, their discordance with medical understanding, their potential implications for public safety, and the discharge of criminal liability.

Conclusion

The applicability of McNaughton’s Rule in India has significantly shaped the defence of insanity under the Indian Penal Code. Section 84 of the Indian Penal Code embodies the principles in McNaughton’s Rule and provides a framework for determining the criminal responsibility of individuals with unsound minds. However, there have been debates and challenges regarding the sufficiency and adequacy of the Rule in the Indian context.