Can the police force me to undergo a narco-analysis or polygraph test?

Question

The investigating officer wants me to undergo a narco-analysis and polygraph test during investigation. Am I legally bound to consent to this? I have been reading conflicting things online and I would like to understand what Indian law actually says about this, which Act and Section applies, what the realistic timelines and costs are, and what I should be doing right now to protect my position. If the matter can be resolved without litigation I would prefer that route, but I want to know what my rights are before I agree to anything or sign any document.

MyVakeel Legal Desk · Accepted Answer

Can the police force me to undergo a narco-analysis or polygraph test? is governed in India primarily by Constitution of India Art.20(3), BNSS 2023 s.176 and Constitution of India Art.21. The short answer is set out below, followed by the practical steps most people in this situation need to take. Read it alongside the specific provisions named, because the exact relief available to you turns on the facts you can prove on paper.

In Selvi v. State of Karnataka (2010), the Supreme Court held that narco-analysis, polygraph and brain-mapping tests cannot be administered without the free and voluntary consent of the accused or witness.

Involuntary administration of such tests violates the right against self-incrimination under Article 20(3) and the right to personal liberty and privacy under Article 21.

Even where consent is given, the results of these tests are not admissible as substantive evidence, though any factual information subsequently discovered as a result may be admissible under limited circumstances.

If consent is sought, it must be recorded before a Magistrate along with legal representation and medical safeguards, and consent can be withdrawn at any stage before the test is conducted.

Refusal to undergo such tests cannot by itself be treated as an adverse inference of guilt against the accused.

What to do next: 1) Do not sign any consent form under pressure without consulting a lawyer; 2) If consent is genuinely intended, insist it be recorded before a Magistrate with counsel present; 3) Challenge any attempt at forcible or coercive testing through a habeas corpus or writ petition; 4) Rely on Selvi v. Karnataka if such test results are sought to be used against you at trial.

If the other side has already issued a notice, filed a case or set a deadline, treat the matter as time-sensitive — most remedies under Constitution of India Art.20(3) carry limitation periods, and a delay you cannot explain weakens an otherwise strong case. You can post the details on the MyVakeel forum for a practising advocate to review, or book a paid consultation with a Bar Council verified lawyer in this practice area.