Forced Narco Tests

The Supreme Court of India, in Amlesh Kumar v. State of Bihar (2025), set aside a 2025 Patna High Court order that had permitted a narco test. The Court categorically held that any forced or involuntary narco test is unconstitutional, reaffirming earlier constitutional safeguards.

What is a Narco Test?

A narco test is an investigative technique in which the accused is administered sedative or hypnotic drugs, such as Sodium Pentothal (a barbiturate), to lower mental inhibitions.
The objective is to extract concealed information by reducing the person’s ability to reason and exercise conscious control.
Narco tests are often classified as non-violent investigative methods, similar to polygraph and brain-mapping tests.

Constitutional Violations Involved

Violation of Article 20(3): Protection Against Self-Incrimination

Article 20(3) of the Constitution guarantees that no accused person shall be compelled to be a witness against oneself.
Forced narco tests amount to testimonial compulsion, as the responses are extracted from the subject’s mind without free consent.

Violation of Article 21: Right to Life and Personal Liberty

Article 21 protects personal liberty, bodily autonomy, and mental privacy.
Conducting a narco test without the express and informed consent of the accused violates the right to privacy and the right to personal liberty.

Golden Triangle of the Constitution

The Supreme Court in Maneka Gandhi v. Union of India (1978) held that Articles 14, 19, and 21 together form the Golden Triangle of the Constitution.
Any infringement of the right to privacy under Article 21 therefore disrupts this core constitutional framework and undermines due process.

Ethical and Philosophical Considerations

Forced narco tests violate the principle of individual autonomy, which is central to natural justice.
From an ethical perspective, Immanuel Kant’s philosophy emphasizes that actions without consent are morally invalid.
In a democratic criminal justice system, victims’ rights must be balanced with the rights of the accused, and constitutional protections cannot be compromised in the name of investigative efficiency.

Legal Position on Narco Tests in India

Voluntary Narco Tests

A narco test may be conducted only with the free and informed consent of the accused.
Under Section 253 of the Bharatiya Nagarik Suraksha Sanhita (BNSS), 2023, an accused may voluntarily opt for a narco test at the defence stage.
However, there is no absolute or indefeasible right to demand such a test.

Evidentiary Value of Narco Tests

The results of narco tests:

• Do not constitute substantive evidence

• Cannot independently prove guilt

• Require corroboration by independent evidence

Important Judicial Pronouncements

• Selvi v. State of Karnataka (2010): The Supreme Court held that narco tests conducted without free consent are unconstitutional and that their results are inadmissible as evidence.

• Manoj Kumar Saini v. State of Madhya Pradesh (2023): The Court ruled that narco test results cannot be treated as conclusive proof of guilt.

• Vinobhai v. State of Kerala (2025): The Court reaffirmed that narco test results require independent corroboration.

• Amlesh Kumar v. State of Bihar (2025): The Supreme Court struck down forced narco testing and reinforced constitutional safeguards.

Conclusion

The Supreme Court’s ruling clearly establishes that forced narco tests violate constitutional guarantees of dignity, liberty, and privacy.
The judgment strengthens the principle that constitutional morality and due process must prevail over investigative convenience in India’s criminal justice system.