Evidence Law: Indian Evidence Act, 1872 / Bharatiya Sakshya Adhiniyam, 2023 (BSA)
Trap Cases and the Evidence of Decoy Witnesses under the Bharatiya Sakshya Adhiniyam, 2023
Bribery is a transaction between two willing people in private, and there is rarely an independent witness. The trap is the answer the system has developed: the complainant pays, officers watch, and the money is recovered. Everything then turns on the evidence of people who took part in the very transaction charged — which raises the question whether they are accomplices requiring corroboration. They are not, and the reason why explains how their evidence is assessed.
1. The Question
A trap produces three classes of witness, and the evidentiary treatment of each is different.
Witness | Role | Status |
|---|---|---|
The complainant or decoy | Pays the bribe under the supervision of the investigating agency | Not an accomplice; an interested or partisan witness |
The panch or shadow witnesses | Independent persons who witness the pre-trap proceedings, the payment and the recovery | Not accomplices; their independence is the issue |
The trap officers | Conduct the trap and effect the recovery | Official witnesses, assessed on truthfulness and not on status |
The question that arises is whether the first class are accomplices within Section 138, so that illustration (b) to Section 119 applies and corroboration in material particulars is required as a rule of prudence.
⚠ The answer turns on purpose, not participation An accomplice is a person concerned with another in the commission of the offence. A decoy participates in the transaction, but he does so in order to detect the offence rather than to commit it — and it is the purpose, not the physical participation, that determines the character of his involvement. A person who hands over marked currency at the direction of an investigating officer, in order that the recipient may be caught, is not sharing in the crime; he is exposing it. |
2. The Leading Authority
📖 State of Bihar v. Basawan Singh, AIR 1958 SC 500 Held: A Constitution Bench considered the evidence of witnesses who participate in a trap. The Court held that such witnesses are not accomplices, but that their evidence is of the kind which requires careful scrutiny, they being to some extent interested or partisan in the success of the trap they helped to lay. If the Court is satisfied, on a careful scrutiny, that the evidence of the trap witnesses is reliable, it may act upon it without corroboration; the rule requiring corroboration of an accomplice does not apply to them. But where the Court is not so satisfied, it should look for independent corroboration before acting on their testimony. Ratio: Trap witnesses are not accomplices. Their evidence is scrutinised with care as partisan evidence, and if found reliable may be acted upon without corroboration. |
The distinction the decision draws is between two quite different reasons for caution, and they should not be run together.
Accomplice | Trap or decoy witness | |
|---|---|---|
Why the law is cautious | He participated in the crime and has a motive to shift blame and to secure his own position | He is partisan — he helped lay the trap and is interested in its success |
Governing provisions | Section 138, with illustration (b) to Section 119 | No provision; judicial practice on interested witnesses |
Corroboration | Required as a rule of prudence, in material particulars connecting the accused | Not required as a rule; the court scrutinises and may act without it |
If the witness is disbelieved | Corroboration cannot rehabilitate him — the double test | The same — reliability comes first |
The approach in Bhanuprasad Hariprasad Dave v. State of Gujarat, AIR 1968 SC 1323 is to the same effect, the Court holding that a person who pays money to a public servant in circumstances amounting to extortion — where the payment was demanded and he was the victim rather than a willing participant — is plainly not an accomplice, having committed no offence at all.
⚠ There is no defence of entrapment in India Indian law does not recognise entrapment as a substantive defence. The question is not whether the accused was induced to commit the offence but whether he committed it. What matters evidentially is therefore the character of the trap: a legitimate trap, laid after a demand has already been made, catches an offence already in train. A trap in which the idea originated entirely with the agency and the accused was persuaded into conduct he would not otherwise have engaged in is not a defence, but it bears heavily on whether the demand — the essential ingredient — has been proved at all. |
3. The Interested Witness Framework
If a trap witness is not an accomplice, the framework that applies to him is the one governing interested witnesses, and the settled propositions carry across directly.
Partisan evidence is not to be mechanically rejected. Masalti v. State of Uttar Pradesh, AIR 1965 SC 202 holds that discarding evidence on the sole ground that it is partisan would invariably lead to failure of justice, and that the proper course is to examine it with care and caution.
Status is irrelevant; truthfulness is everything. Girja Prasad v. State of Madhya Pradesh, (2007) 7 SCC 625 holds that credibility is considered on the touchstone of reliability, trustworthiness and consistency, and not on the basis of the status of the witness — which disposes of the submission that trap officers are to be distrusted because they are police officers.
Independence is a question of fact. The panch witnesses are described as independent, and frequently are not — the same persons appear as panchas in case after case, or are subordinate employees of the department. Where that is shown, their evidence is assessed as partisan rather than independent, and the court looks for support elsewhere.
4. What a Trap Case Must Establish
The evidentiary question is not only about the witnesses. In a prosecution under the Prevention of Corruption Act, 1988 two things must be proved and the first is where most cases fail.
Element | What it requires |
|---|---|
Demand | That the public servant demanded the gratification. This is the sine qua non; mere recovery does not establish it |
Acceptance | That he accepted or agreed to accept it — ordinarily proved by the recovery and the chemical test |
The primacy of demand is settled. In B. Jayaraj v. State of Andhra Pradesh, (2014) 13 SCC 55 the Court held that proof of demand is indispensable, and that in its absence the mere recovery of tainted currency cannot sustain a conviction — the presumption under Section 20 of the Prevention of Corruption Act, 1988 being attracted only once acceptance of gratification is itself proved.
📖 Neeraj Dutta v. State (Government of NCT of Delhi), (2023) 4 SCC 731 Held: A Constitution Bench resolved the conflict on how demand may be proved. In the absence of direct oral or documentary evidence of demand — because the complainant is dead, has turned hostile, or is otherwise unavailable — the demand and acceptance of illegal gratification can be proved by circumstantial evidence. Proof of demand and acceptance is an indispensable requirement, but the manner of proof is not confined to the direct testimony of the complainant. On the foundational facts of demand and acceptance being proved, the presumption under Section 20 of the Prevention of Corruption Act, 1988 may be drawn, and the burden then shifts to the accused to rebut it on a preponderance of probabilities. Ratio: Demand remains essential, but may be established by circumstantial evidence where direct evidence is unavailable; the statutory presumption operates only once the foundational facts are proved. |
The decision is important for the topic because it removes the proposition that a trap case collapses automatically when the complainant turns hostile. What survives is a requirement that the foundational facts be proved — by whatever evidence is available — before the presumption does any work. That is the same structure as every other reverse burden in the Adhiniyam, and the framework in Noor Aga v. State of Punjab, (2008) 16 SCC 417 applies.
5. The Supporting Evidence
A trap generates material of several kinds, and each has its own evidentiary basis under the Adhiniyam.
Material | How it operates |
|---|---|
Pre-trap memorandum — numbers of the currency, treatment with phenolphthalein, instructions to the decoy | A contemporaneous record; proved by the officer, and available to refresh memory under Section 162 |
The chemical test — the sodium carbonate solution turning pink on the recipient's hands or pocket | Expert or scientific evidence under Section 39, and a fact in issue in itself |
Recovery of the marked currency | A fact proved by the recovering officer and the panchas; establishes acceptance, not demand |
A recording of the demand | An electronic record, admissible under Sections 61 to 63, with the certificate under Section 63(4) where it is secondary evidence |
The accused's explanation | Section 109, facts especially within his knowledge; and the presumption under Section 20 of the 1988 Act |
Conduct at the time of the trap | Relevant under Section 6(2) |
The recording of the demand deserves separate mention, because it has transformed trap cases in practice. A complainant who records the demand on his own telephone before approaching the agency supplies direct evidence of the element that is otherwise hardest to prove. Under the Adhiniyam his own device is ordinarily primary evidence by force of Explanation 3 to Section 57, the record existing in more than one file, so the certificate question may not arise at all. Where the recording is produced from another source, the conditions in Ram Singh v. Col. Ram Singh, 1985 Supp SCC 611 on the admissibility of tape recordings apply — authenticity, accuracy, relevance, and the voice being duly identified.
6. How a Trap Case Is Attacked
Six lines of attack recur, and each engages a different provision.
- No demand proved. The strongest line, and the one on which most acquittals rest. Recovery without demand is not the offence — B. Jayaraj.
- The panch witnesses were not independent — departmental subordinates, or persons who appear repeatedly as panchas. Their evidence is then partisan rather than independent.
- The currency was planted or thrust. Where the accused says the money was pushed into his pocket, the chemical test proves contact and not acceptance, and the distinction is real.
- The pre-trap proceedings are defective — numbers not recorded, the memorandum prepared afterwards, the phenolphthalein treatment not witnessed.
- The complainant has a motive — a pending adverse decision, prior enmity, or a desire to avoid a legitimate demand made by the public servant in the discharge of duty.
- The presumption was applied without foundational facts. Section 20 of the 1988 Act operates only once acceptance is proved, and a court that presumes the demand from the recovery has inverted the exercise — Neeraj Dutta.
⚠ The chemical test proves contact, not consent A positive phenolphthalein test shows that the accused's hands or clothing came into contact with the treated currency. It does not show that he took it willingly, that he demanded it, or that he knew what it was. Where the defence is that the money was thrust upon him, the test is entirely consistent with that account — and the prosecution must prove the demand and the acceptance by other material. Treating a positive test as proof of the offence is a common error in argument. |
7. The Wider Category of Decoy Evidence
Traps are not confined to bribery, and the same reasoning applies wherever a person participates in a transaction in order to detect an offence.
- Narcotics cases, where a decoy purchases a controlled substance.
- Counterfeiting and excise cases, where an officer or a decoy buys the article.
- Sting operations conducted by private persons or journalists, where the participant is neither an officer nor acting under supervision.
The last of these is the least settled. A private person conducting a sting is not acting under the direction of an investigating agency, and there is no pre-trap memorandum, no independent panch and no supervised recovery. The material such an operation produces is ordinarily an electronic record, and the questions that arise are those of Sections 61 to 63 — authenticity, integrity, and the certificate where the record is secondary evidence — rather than the accomplice question. A court assessing it looks at how it was made, whether it has been edited, whether the maker had a motive, and whether the record is complete or shows only what suits him.
8. Practical Points
- Do not concede that a decoy is an accomplice. He is not, and the corroboration rule in illustration (b) to Section 119 does not apply — Basawan Singh.
- Establish demand independently of recovery. It is the indispensable element and the point on which the case will turn.
- Where the complainant has turned hostile, build demand from circumstantial evidence — Neeraj Dutta — rather than treating the case as lost.
- Prove the foundational facts before invoking Section 20 of the 1988 Act; the presumption does not supply them.
- Establish that the panchas were genuinely independent, and be ready to meet the suggestion that they are habitual witnesses.
- Where there is a recording of the demand, consider Explanation 3 to Section 57 — the complainant's own device may be primary evidence, and no certificate need arise.
- For the defence, separate contact from acceptance. A positive chemical test establishes the first and not the second.
- Scrutinise the pre-trap memorandum — when it was prepared, who witnessed the treatment of the currency, and whether the numbers were recorded before the trap.
9. The Position Stated Shortly
- A trap or decoy witness is not an accomplice, his purpose being detection rather than participation.
- Section 138 and illustration (b) to Section 119 therefore do not apply, and corroboration is not required as a rule.
- His evidence is scrutinised with care as partisan evidence, and may be acted upon without corroboration if found reliable — Basawan Singh.
- Partisan evidence is not to be mechanically rejected — Masalti — and status is irrelevant to credibility — Girja Prasad.
- There is no defence of entrapment in India, though the origin of the transaction bears on whether demand is proved.
- Demand is indispensable and cannot be inferred from recovery alone — B. Jayaraj.
- Demand may be proved by circumstantial evidence where direct evidence is unavailable — Neeraj Dutta.
- The presumption under Section 20 of the 1988 Act operates only once the foundational facts are proved, and the rebuttal is on a preponderance of probabilities.
10. Related Topics and Provisions
Topic or provision | Connection |
|---|---|
Accomplice Evidence — Section 138 | The category a decoy does not fall into |
Special Types of Witnesses | Interested, partisan, police and official witnesses |
Reverse Burden of Proof | The framework governing Section 20 of the 1988 Act |
Audio and Video Recordings as Evidence | Recordings of the demand, and the Ram Singh conditions |
Electronic or Digital Record as Primary Evidence | Explanation 3 to Section 57, and the complainant's own device |
Burden of Proving a Fact Especially Within Knowledge — Section 109 | The accused's explanation for possession of the currency |
Forensic and Scientific Evidence | The chemical test, and what it does and does not establish |
Prevention of Corruption Act, 1988 | Sections 7 and 13, and the presumption in Section 20 |