Constitution of India
Article 20: Protection in respect of conviction for offences
Part III — Fundamental Rights
Clause (1) — Ex Post Facto Law
WHAT IT SAYS: No person shall be convicted of any offence except for violation of a law in force at the time of commission, nor be subjected to a penalty greater than that which could have been inflicted under the law then in force. WHAT IT MEANS: The State cannot retrospectively criminalize conduct or retrospectively enhance punishment for an offence already committed. KEY DOCTRINE: Doctrine of Ex Post Facto Law — bars retroactive criminal legislation (but not retroactive procedural or civil laws).
Clause (2) — Double Jeopardy
WHAT IT SAYS: No person shall be prosecuted and punished for the same offence more than once. WHAT IT MEANS: Once judicially prosecuted AND punished, a person cannot face a second criminal prosecution for the identical offence. Departmental/administrative proceedings do NOT count as 'prosecution'. KEY DOCTRINE: Doctrine of Double Jeopardy (autrefois convict) — based on maxim 'nemo debet bis vexari pro una et eadem causa'. Narrower than US Fifth Amendment — in India both prosecution AND punishment must have occurred; mere acquittal in first trial does not bar retrial.
Clause (3) — Self-Incrimination
WHAT IT SAYS: No person accused of any offence shall be compelled to be a witness against himself. WHAT IT MEANS: An accused cannot be forced to give oral or documentary testimony that incriminates them. Physical/material evidence (fingerprints, blood samples) is excluded from this protection. KEY DOCTRINE: Doctrine of Prohibition against Testimonial Compulsion — based on maxim 'nemo tenetur prodere accusare seipsum'. Applies from investigation stage onward, not just at trial (per Nandini Satpathy, 1978).
Constitutional Inspiration
SOURCE(S): 1. United States Constitution — Fifth Amendment Original provision: No person shall be subject for the same offence to be twice put in jeopardy; nor compelled in any criminal case to be a witness against himself. What India kept: Double jeopardy (Clause 2) and self-incrimination (Clause 3) — both drawn from the Fifth Amendment. 2. English Common Law & Bill of Rights, 1689 Original provision: Common law principle against retrospective penal statutes and the nemo tenetur principle. What India kept: The ex post facto prohibition in Clause (1). INDIA'S SPECIFIC ADAPTATIONS: 1. Narrower double jeopardy — India requires BOTH prosecution AND punishment before the bar operates; US bars even re-prosecution after acquittal — reflects caution against letting guilty persons escape on technicalities. 2. Self-incrimination limited to 'accused' — US Fifth Amendment protects any person including witnesses; India limits it to persons formally accused — drafters wanted to balance investigative efficacy with accused's rights. 3. No Fourth Amendment equivalent — Constituent Assembly rejected a proposed clause against unreasonable searches and seizures, unlike the US — drafters felt existing statutory safeguards were sufficient. 4. Non-derogable status — After the 44th Amendment (1978), Article 20 (along with Article 21) cannot be suspended even during a National Emergency under Article 359 — a lesson from the 1975-77 Emergency.
Constituent Assembly Debate
DEBATED ON: 2, 3, and 6 December 1948 (CAD Volume VII) DRAFT ARTICLE: Numbered as Draft Article 14 in the Draft Constitution. KEY SPEAKERS: 1. Dr. B.R. Ambedkar (Bombay, Drafting Committee Chairman) — Moved the article; argued these three protections are the bare minimum a constitutional order owes to a person facing criminal prosecution. 2. Mr. Naziruddin Ahmad (West Bengal, Drafting Committee) — Proposed expanding Clause (2) from 'punished' to 'prosecuted and punished', to cover situations where a government official faces both disciplinary proceedings and court prosecution for the same act. Amendment adopted. 3. Pandit Thakur Dass Bhargava — Proposed replacing the word 'law' with 'law in force' to align with the definition in Draft Article 302 (Article 372). Amendment accepted. 4. Z.H. Lari / K.T. Shah — Proposed adding a new clause protecting against 'unreasonable searches and seizures' similar to the US Fourth Amendment, Irish, and German Constitutions. MAJOR DISAGREEMENTS: 1. Searches and seizures clause — Several members supported adding a Fourth Amendment-type protection, but it was rejected by the Assembly. 2. Scope of Clause (2) — Whether 'punishment' alone should trigger the bar, or 'prosecution and punishment' — resolved by adopting the broader phrase. FINAL OUTCOME: Article 14 (renumbered as Article 20) was adopted with the amendments expanding Clause (2) to include 'prosecution' and substituting 'law in force'; the proposed search-and-seizure clause was rejected.
Landmark Judgments
LANDMARK JUDGMENTS: 1. Kedar Nath Bajoria v. State of West Bengal (1953) — Enhanced punishment cannot be applied retroactively to an act committed before the new law; Article 20(1) bars only retroactive conviction and penalty, not change in procedure. 2. Maqbool Hussain v. State of Bombay (1953) — Confiscation by customs authorities is NOT 'prosecution' by a judicial tribunal; subsequent criminal prosecution is not barred under Article 20(2). 3. M.P. Sharma v. Satish Chandra (1954) — Article 20(3) protects against 'testimonial compulsion'; search and seizure of documents does NOT amount to compelled self-incrimination. 4. State of Bombay v. Kathi Kalu Oghad (1961) — Distinguished testimonial evidence from material/physical evidence; compelling fingerprints, handwriting samples, or blood samples does NOT violate Article 20(3). 5. State of Bombay v. S.L. Apte (1961) — Prosecution for two distinct offences arising from the same act is not double jeopardy if the ingredients of the offences differ. 6. Nandini Satpathy v. P.L. Dani (1978) — Right against self-incrimination under Article 20(3) extends to the police investigation stage, not just the trial; accused can refuse to answer incriminatory questions during interrogation. 7. Maru Ram v. Union of India (1980) — Article 20(1) also bars retrospective increase of penalty beyond what existed at the time of the offence. 8. Selvi v. State of Karnataka (2010) — Involuntary administration of narcoanalysis, polygraph, and brain-mapping tests violates Article 20(3) and Article 21 (right to mental privacy). 9. K.S. Puttaswamy v. Union of India (2017) — Recognised informational privacy as a fundamental right under Article 21, strengthening Article 20(3) protections in self-incrimination contexts. NOTABLE DISSENTS: 1. Justice A.K. Sarkar, Justice K.C. Dasgupta, and Justice S.K. Das in Kathi Kalu Oghad (1961) — Took a broader view of 'witness', arguing that even physical specimens should be covered by Article 20(3) since they can be incriminatory. KEY UPSC POINTS: 1. Article 20 is available to ALL persons — citizens, foreigners, and legal entities (corporations). 2. Article 20 (along with Article 21) CANNOT be suspended even during a National Emergency under Article 352 — made non-derogable by the 44th Constitutional Amendment Act, 1978. 3. Article 20 has NEVER been amended since its enactment in 1950; the only related change is the 44th Amendment's modification of Article 359 to exclude Articles 20 and 21 from suspension. 4. Article 20 applies only to CRIMINAL offences, not civil matters or tax proceedings. 5. CrPC Section 300 (now BNSS Section 337) provides broader statutory double jeopardy protection than the narrower constitutional bar under Article 20(2).