Recommended resources
The freely available resources this lesson will direct you to.
- Article 21 | Right to Life Explained | Polity Simplified | Indian Polity | Drishti IAS Englishwww.youtube.com
- Article 20 Indian Constitution: Ex post facto law, double jeopardy & self incrimationwww.youtube.com
- Article 20 in Constitution of Indiaindiankanoon.org
- Shri D.K. Basu,Ashok K. Johri vs State Of West Bengal,State Of U.P on 18 December, 1996indiankanoon.org
Welcome back. Last lesson asked whether the State could justify restrictions on equality and freedom under Articles 14–19. This lesson examines a more intrusive use of State power: changing criminal consequences after an act, compelling an accused person to speak, searching private information, and holding someone in custody.
For the Higher Judicial Service examination, keep three questions distinct: May the State impose this criminal liability? May it obtain or use this information? May it restrain this person’s liberty in this manner? Articles 20, 21, and 22 answer different parts of that inquiry. Allow about 45–50 minutes, including the selected resources.
Article 20: limits on prosecution and compelled evidence
Article 20 contains three protections available to persons, not just citizens. Read its numbered clauses before relying on a shorthand such as “no retrospective law” or “double jeopardy.” The exact words determine the answer.
Article 20 in Constitution of India
Read the constitutional text reproduced by Indian Kanoon to fix the distinct requirements of clauses (1), (2), and (3).
At the top of the page, read the three clauses. Continue through the editorial discussion of retrospective punishment, ending with its paragraph on a later reduction in punishment. Treat the numbered constitutional text as controlling: the editorial explanation should not replace the precise wording of clause (2).
Article 20(1) fixes two matters by the law in force when the act was committed. A person cannot be convicted for conduct that was not then an offence, or subjected to a penalty greater than the one then available. Suppose conduct occurred in June 2024 and an offence carrying a higher maximum sentence was introduced later. A trial in 2026 does not make the later, harsher penalty applicable to the earlier conduct.
This does not mean every subsequent change in trial procedure is prohibited. Nor does Article 20(1) itself guarantee that every later, more lenient sentencing provision automatically applies backwards: examine the later enactment and its savings provisions. This distinction will matter when we study the IPC–BNS and CrPC–BNSS transitions in detail.
Article 20(2) says that no person shall be “prosecuted and punished for the same offence more than once.” Test both the character of the earlier proceeding and the identity of the offence. A departmental inquiry or a customs confiscation is not automatically a prior criminal prosecution and punishment; Maqbool Hussain v. State of Bombay illustrates why that distinction matters. Equally, two charges arising from one episode are not necessarily the same offence: compare their legal ingredients, not merely their factual setting. A prior acquittal raises an important statutory bar against a second trial, but do not inaccurately attribute every such bar to Article 20(2), whose text says prosecuted and punished. Identify the applicable criminal-procedure rule as well.
Article 20(3) protects a person accused of an offence from being compelled to be a witness against himself. An accused need not supply an incriminating account merely because an investigator demands one. The protection can matter during investigation, not only in the witness box. Compelling a person to communicate the contents of their mind is different from obtaining identifying physical evidence such as fingerprints or handwriting specimens under lawful authority. The latter is not, merely by being compelled, testimonial self-incrimination; its collection must still comply with applicable law and Article 21. In Selvi v. State of Karnataka, involuntary techniques such as narcoanalysis and polygraph testing were held impermissible; an investigator cannot bypass the prohibition by changing the method of extracting answers.
Keep a forced disclosure of a remembered phone password analytically separate from a lawful seizure of the phone. The former raises a serious testimonial-compulsion question; the latter raises questions of search authority, scope, and privacy. Do not assume that a rule about fingerprints settles every digital-access problem.
Article 21: lawful power is not enough without fair procedure
Article 21 provides that no person shall be deprived of life or personal liberty except according to procedure established by law. Its protection extends to non-citizens. “Life” includes human dignity, so torture or custodial violence is not made acceptable by calling it an interrogation method.
The decisive development is Maneka Gandhi v. Union of India: the procedure used to restrict liberty must be fair, just, and reasonable, not merely written down and mechanically followed. Watch the short account below for that change in approach.
Article 21 | Right to Life Explained | Polity Simplified | Indian Polity | Drishti IAS English
Watch “Article 21 | Right to Life Explained” from Drishti IAS English for its account of the shift from a narrow reading of procedure to the fair-procedure requirement.
Watch the Maneka Gandhi shift, then interconnected rights. Focus on why the existence of statutory power does not finish the constitutional inquiry. Qualify the video's broad formulation: Article 19 must also be examined where an applicable Article 19 freedom is engaged; its freedoms are guaranteed to citizens, whereas Article 21 protects persons.
In a coercion problem, therefore, ask whether there is legal authority, whether the decision follows its conditions, and whether the law and procedure afford meaningful protection against arbitrary deprivation. Fairness has practical consequences: access to legal assistance, a genuine judicial examination of custody, and a reasonably prompt and fair trial matter to liberty. Fair procedure does not mean an identical advance hearing before every urgent investigative step; the required safeguards depend on the power and setting.
Privacy is one important aspect of Article 21. In Justice K.S. Puttaswamy (Retd.) v. Union of India, the Supreme Court affirmed a fundamental right to privacy, including interests in bodily integrity, personal choice, and information about oneself. Privacy is not an absolute bar to investigation. For a proposed intrusion, identify its legal basis and legitimate State aim, then examine whether its scope is proportionate to that aim and whether safeguards constrain misuse. A search for a specified conversation relevant to a fraud allegation is constitutionally different from copying years of unrelated intimate communications without explaining why that breadth is necessary.
Do not collapse these protections. A phone search might be authorised by criminal-procedure law yet excessive in scope under Article 21. Conversely, an investigator might obtain a relevant record lawfully while still being prohibited by Article 20(3) from compelling the accused to provide an incriminating testimonial explanation of it. The admissibility and proof of digital material will receive separate treatment in the evidence module.
Article 22 and the arrest record: custody must be visible and accountable
For an ordinary arrest, Article 22(1) requires that the arrested person be informed, as soon as may be, of the grounds of arrest and not be denied the right to consult and be defended by a legal practitioner of choice. Article 22(2) requires production before the nearest Magistrate within 24 hours of arrest, excluding necessary journey time; detention beyond that period needs a Magistrate’s authority. The clock is not safely reset by writing a later time on an arrest memo if the person was already actually restrained.
D.K. Basu v. State of West Bengal connects these constitutional guarantees to a record of who arrested the person, when, where, and in what condition. Study the Court’s requirements rather than treating an arrest form as a substitute for the right itself.
Shri D.K. Basu,Ashok K. Johri vs State Of West Bengal,State Of U.P on 18 December, 1996
Read the Supreme Court's explanation of liberty and its arrest-and-detention requirements. This supplies a practical checklist for testing a custody file, not just a list to memorise.
In the passage beginning “Fundamental rights occupy a place of pride,” read the constitutional discussion of Articles 20(3), 21, and 22. Then, under the Court's numbered requirements introduced by “We therefore, consider it appropriate,” read the arrest requirements, through item (11). As you read, group them by purpose: identifying officers, recording arrest and injuries, notifying others, medical oversight, access to counsel, and external accountability.
The directions require, among other things, visible officer identification; a contemporaneous arrest memo with a witness and the arrestee’s countersignature; notification of a friend or relative; a detention-diary entry; recording injuries in an inspection memo where requested; periodic medical examination; transmission of documents to the Magistrate; and information to the police control room. The judgment permits the arrestee to meet a lawyer during interrogation, though not throughout it. That qualification should not be turned into a claim that consultation may be denied altogether.
Read a present-day file alongside the applicable statutory arrest provisions, not solely the 1996 directions. In particular, separate the question whether arrest was necessary and authorised from the question whether its manner and subsequent detention complied with safeguards. The detailed CrPC–BNSS choice, arrest provisions, and remand powers come later in the course.
Article 22 also distinguishes preventive detention from ordinary criminal custody. Under Article 22(3), the protections in clauses (1) and (2) do not apply to an enemy alien or a person arrested or detained under a law providing for preventive detention. That is not a blanket exemption from constitutional control. Articles 22(4)–(7) regulate the duration and advisory-board framework, subject to their stated exceptions; Article 22(5) requires communication of grounds as soon as may be and the earliest opportunity to make a representation. Article 22(6) permits withholding facts whose disclosure the authority considers against the public interest. Article 21’s demand for lawful, non-arbitrary procedure remains relevant. If an order purports to prevent future harmful activity, examine the preventive-detention statute and these specific safeguards rather than applying the ordinary 24-hour rule without qualification.
Reading a single coercion file
Consider this fictional Maharashtra file. An alleged dishonest transaction took place on 20 June 2024. The complaint was first made in 2026. Police physically restrain the suspect at 8 a.m. on Tuesday, but record the arrest at 4 p.m. They produce her before a Magistrate at 1 p.m. on Wednesday; travel took about 30 minutes. During custody, officers refuse a request to inform her sister, demand an account of how the transaction was planned, and copy her entire phone, including years of unrelated personal messages. She reports an injury on arrest. The prosecution proposes a penalty introduced after June 2024. Police also point to an earlier employer’s disciplinary penalty as a reason to reject her objection to a criminal trial.
A ranked judicial issue map would look like this:
- Fix the offence date and penalty first. Article 20(1) prevents conviction for an offence created only later or imposition of a subsequently increased penalty for the June 2024 act. Identify the substantive law applicable on that date; do not choose the BNS simply because investigation began in 2026. The law governing the later procedure calls for a separate commencement-and-savings inquiry.
- Reject the automatic double-jeopardy argument. The employer’s disciplinary penalty is not, without more, an earlier criminal prosecution and punishment for the same offence. Check the nature of any earlier proceeding and the ingredients of any purportedly repeated charge.
- Examine the restraint actually imposed. If she was not free to leave from 8 a.m., the later paperwork does not itself determine when custody began. Production at 1 p.m. the next day is 29 hours after that restraint; subtracting about 30 minutes of necessary travel still leaves more than 24 hours. Ask what authority, if any, justified detention beyond the constitutional period.
- Test each safeguard against the record. Was she promptly told the grounds? Was the arrest memo accurate? Was her sister informed as required? Was the reported injury documented and medically assessed? Could she consult counsel? The Magistrate should scrutinise these matters rather than treating production as a formality.
- Separate statement from search. Compelling her to supply an incriminating narrative engages Article 20(3). For the phone, identify search authority and assess the copying’s necessity, breadth, and safeguards under Article 21. Neither answer automatically resolves the other.
A proven breach calls for an appropriate response, not the unsupported assertion that every procedural lapse automatically acquits the accused. Depending on the issue, the court may decline unauthorised custody, require examination or records, address the use of improperly obtained material under governing law, or facilitate an appropriate constitutional remedy. D.K. Basu also explains public-law compensation for an established violation of life or liberty, ordinarily pursued in the constitutional jurisdiction of the Supreme Court or High Court; it is not an automatic damages award in every remand proceeding.
This ordering is useful in a mains answer or a reasoned custody order: determine the legally applicable offence, identify the precise restraint or demand, and then decide each constitutional objection on its own facts. It avoids both under-protecting liberty and treating every investigative act as forbidden.
Conclusion
Article 20 protects against retrospective criminal liability or harsher punishment, a second prosecution and punishment for the same offence, and compelled self-incriminating testimony. Article 21 demands lawful, fair and reasonable treatment of life and liberty, including proportionate treatment of privacy. Article 22 makes ordinary arrest subject to notice, counsel, and prompt production, while imposing a distinct constitutional framework on preventive detention. The D.K. Basu requirements make custody auditable rather than invisible.
Next, we will ask which legislature had power to make the law in the first place, using Articles 245–254 and the Seventh Schedule. That question precedes even a careful assessment of whether officials applied a coercive law fairly.