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Supreme Court of India· 29 May 2026

Under the Constitution of India, what constitutes illegal detention?

Daudayal v. The State of Rajasthan & Ors.
2026 INSC 599 · SLP(Crl)No.5036 of 2025
Coram: Sanjay Karol; Augustine George Masih
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Answer

The deprivation of liberty by the State without lawful authority or in violation of provisions of the Constitution. It involves actual custody such that the individual is not free to leave, and the detention lacks a valid legal basis — a lack of authorisation, or an authority that is void or expired. Even where a law permits detention, it becomes illegal if the procedure followed is not just, fair, and reasonable, including a failure to observe essential safeguards, or where the power to detain is exercised arbitrarily, for an improper purpose, or in bad faith.

Headnote

Constitution of India — Art.21 — Art.32 — Art.226 — Rajasthan Prisoners Release on Parole Rules, 1958 — r.9 — Illegal detention — Habeas corpus — Compensation as a public law remedy — Constitution of India — Art.21 — Illegal detention — Meaning — Held: The deprivation of liberty by the State without lawful authority or in violation of provisions of the Constitution is illegal detention. Even where a law permits detention, it becomes illegal if the procedure followed is not just, fair, and reasonable. (¶7) Constitution of India — Art.226 — Habeas corpus — Non-release after parole granted — Held further: Habeas corpus is available in all cases of wrongful deprivation of personal liberty and is maintainable against any form of detention. Once parole has been granted and sureties produced to the satisfaction of the concerned court, the non-release becomes illegal detention. (¶11) Rajasthan Prisoners Release on Parole Rules, 1958 — r.9 — Release order — Obey first, appeal later — Held further: A judicial order remains in operation unless stayed, modified, or set aside, and the mere filing of an appeal does not keep it in abeyance. A State that never challenged the release order cannot question its legality at a belated stage. (¶9) Constitution of India — Art.21 — Compensation — Recognised public law remedy — Held further: Payment of compensation is an acceptable and recognised public law remedy, and the liberty of an individual cannot be placed sub-par to the State's bureaucratic processes of deciding whether to file an appeal. Rs.11,00,000/- awarded for twenty-four days of illegal custody; appeal allowed. (¶12)

In the Court's own words
Paragraph 7At the outset, we must consider what constitutes illegal detention. It appears that there is not a recognised definition of illegal detention. Detention is defined as an act of officially detaining someone or the act or condition of being officially forced to stay in a place[^10]. Illegal is that which is not allowed by law. Reading them together, it can be observed that illegal detention is that act of forcing someone to stay in a particular place, which is not sanctioned by law. Another aspect would be if the detention is in violation of the procedure established by law. In our view, perhaps, it may be termed as follows: “The deprivation of liberty by the State without lawful authority or in violation of provisions of the Constitution is illegal detention.” It involves actual custody such that the individual is not free to leave. The detention lacks a valid legal basis such as where there is a lack of authorisation, or where any said authority is void/expired. Even where a law permits detention, it becomes illegal if the procedure followed is not just, fair, and reasonable, including failure to observe essential safeguards. It would also cover situations where the power to detain is exercised arbitrarily, for an improper purpose, or in bad faith.
Acts & Sections
Art.21 Constitution of IndiaArt.226 Constitution of IndiaArt.32 Constitution of Indiar.9 Rajasthan Prisoners Release on Parole Rules, 1958s.304 Part II Indian Penal Code, 1860s.148 Indian Penal Code, 1860

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Also decided in this judgment
Is a writ of habeas corpus maintainable where a convict lawfully in prison is not released after a court has granted him parole?Does the mere filing, or the contemplation, of an appeal by the State suspend a court order directing a prisoner's release?Under Article 32 or Article 226 of the Constitution of India, can monetary compensation be awarded for an established infringement of Article 21?
Plain-language answer prepared by the LexStreak Editorial Desk — verify against the judgment. Source: Supreme Court of India. Corrections