Kehar Singh & Others v. State (Delhi Administration)

On the morning of October 31, 1984, Smt. Indira Gandhi, Prime Minister of India, was walking from her official residence at 1, Safdarjung Road to her adjoining office at 1, Akbar Road, New Delhi, to attend a television interview with a British documentary crew. As she approached the wicket gate separating the two compounds, two members of the Delhi Police Prime Minister's Security detail deployed at the gate—Sub-Inspector Beant Singh and Constable Satwant Singh—opened fire on her at point-blank range.

Beant Singh fired five rounds from his service revolver, and as the Prime Minister collapsed, Satwant Singh discharged an entire 25-round magazine from his 9mm SAF carbine into her body. Both assailants were immediately apprehended by Indo-Tibetan Border Police (ITBP) commandos. In the ensuing confrontation in the guard room, Beant Singh was shot dead and Satwant Singh was critically injured.

A Special Investigation Team (SIT) was constituted to unearth the wider conspiracy. The prosecution alleged that the assassination was the outcome of an elaborate criminal conspiracy hatched under Section 120-B IPC following Operation Blue Star in June 1984. Three individuals were charged and tried before an Additional Sessions Judge in Tihar Jail: Satwant Singh (the surviving shooter), Kehar Singh (an Assistant in the Directorate General of Supplies and Disposals and maternal uncle of Beant Singh's wife), and Balbir Singh (a Sub-Inspector in the PM's security unit). The trial court convicted all three under Section 302 read with Section 120-B IPC and sentenced them to death, which was confirmed by the Delhi High Court. The convicts appealed by special leave to the Supreme Court.

1. Evidentiary Proof of Criminal Conspiracy: What are the precise legal standards required to establish a criminal conspiracy under Section 120-B IPC in the absence of direct oral or written evidence of an express agreement?
2. Scope and Applicability of Section 10, Indian Evidence Act: What are the mandatory jurisdictional thresholds for admitting the statements, writings, and acts of one alleged co-conspirator against another under Section 10 of the Evidence Act?
3. Suspicious Conduct vs. Legal Proof: Whether isolated meetings, casual conversations, shared grievances, or radical religious opinions between co-accused can legally justify an inference of a criminal conspiracy to assassinate a head of government?
4. Reliability of Police Memos & Fabrication: What is the effect of demonstrably manipulated arrest memos, fabricated general diary entries, and delayed witness disclosures in a capital conspiracy prosecution?

Delivering the principal judgment for the 3-Judge Bench, Justice K. Jagannatha Shetty laid down the definitive evidentiary framework governing criminal conspiracy and trial scrutiny:

A. The Anatomy of Criminal Conspiracy under Section 120-B IPC

The Court held that the gist of the offence of criminal conspiracy under Section 120-A and 120-B IPC is the agreement between two or more persons to do an illegal act. Secrecy is the very essence of conspiracy. Conspirators do not announce their intentions or execute formal pacts; they operate in shadows and dark corners. Therefore, direct evidence of a conspiracy is rarely available, and the prosecution is entitled to prove the agreement through circumstantial evidence:

"The agreement is the crux of the offence. The prosecution may prove the conspiracy by direct evidence or by circumstances, or by both. But the circumstances proved must unerringly point to the existence of an agreement between the accused. Casual conversations, common acquaintance, or religious affinity do not constitute a conspiracy."

B. Strict Threshold for Invoking Section 10 of the Evidence Act

Section 10 of the Indian Evidence Act embodies a special rule of agency, rendering the acts and statements of one conspirator admissible against all others. However, the Court established that Section 10 cannot be invoked lightly:

• Threshold Condition: There must first be independent, *prima facie* evidence creating a "reasonable ground to believe" that two or more persons had conspired together.
• Common Intention Nexus: The act, statement, or writing must have been done "in reference to their common intention".
• Temporal Scope: The statement or act is admissible only during the period when the conspiracy was actively subsisting. Once the conspiracy terminates (by execution or abandonment), subsequent statements (such as confessions made to police or court) cannot be admitted against co-conspirators under Section 10.

C. Suspicion, However Grave, Is Not Proof: The Acquittal of Balbir Singh

The Supreme Court subjected the case against Sub-Inspector Balbir Singh to intense judicial scrutiny and tore the prosecution's evidence against him to shreds:

"Suspicion, however grave, cannot take the place of legal proof. The courts must ensure that in high-profile cases involving national outrage, emotions do not cloud the dispassionate evaluation of legal evidence."

The Court found that the prosecution's allegations against Balbir Singh—that he was seen talking to Beant Singh, that he showed resentment over Operation Blue Star, and that a suspicious handwritten piece of paper was recovered from him—did not establish any meeting of minds. Moreover, the police had fabricated his arrest memo (claiming he was arrested on December 3, 1984 at a bus stand, when contemporaneous records showed he was already in illegal police custody from November 1). Holding that an accused cannot be convicted on fabricated records and speculative theories, the Supreme Court completely acquitted Balbir Singh of all charges.

D. The Conviction and Death Sentence of Kehar Singh

Regarding Kehar Singh, the Court held that the circumstantial chain was unbroken. Kehar Singh was the ideological mentor who systematically indoctrinated Beant Singh, organized his visits to the Golden Temple after Operation Blue Star, arranged the Amrit Chhakna (baptism ceremony), and held secret private meetings with him days before the assassination. When Beant Singh informed Kehar Singh of his impending death, Kehar Singh did not alert authorities but facilitated his resolve. His conviction under Section 120-B read with Section 302 IPC was confirmed, and his death sentence upheld.

E. Satwant Singh: Direct Proof of Assassination

Satwant Singh's conviction under Section 302 read with Section 34 IPC was established beyond all shadow of doubt through overwhelming eyewitness testimony (Narain Singh, Rameshwar Dayal, and Nathu Ram), medical post-mortem reports, ballistic proof proving his SAF carbine fired the 25 recovered bullets, and empty cartridge shell matches. His death sentence was confirmed as the rarest of rare.

Kehar Singh is widely cited as the locus classicus on criminal conspiracy in India:

• Mirza Akbar v. King-Emperor (AIR 1940 PC 176): The Privy Council established the limits of Section 10 of the Evidence Act, holding that words spoken after the completion of the conspiracy are not admissible against co-conspirators. Kehar Singh reaffirmed this temporal boundary.
• Bhagwan Swarup Lal Bishan Lal v. State of Maharashtra (AIR 1965 SC 682): Clarified that for Section 10 to operate, the prosecution must establish a reasonable ground to believe that two or more persons conspired together.
• State (NCT of Delhi) v. Navjot Sandhu @ Afsan Guru (2005) 11 SCC 600: In the Parliament Attack case, the Supreme Court extensively cited Kehar Singh to delineate the thin line between association and criminal conspiracy, acquitting Afsan Guru and Shaukat Hussain under Section 120-B IPC while convicting Afzal Guru.
• Pavana Dibbur v. Directorate of Enforcement (2023 INSC 1029): The Supreme Court reaffirmed the Kehar Singh doctrine while holding that Section 120-B cannot be invoked in isolation under the PMLA unless the underlying conspiracy involves a scheduled offence.

The conspiracy and evidentiary doctrines established in Kehar Singh directly map to the Bharatiya Nyaya Sanhita (BNS) 2023 and the Bharatiya Sakshya Adhiniyam (BSA) 2023: