Rasan @ Raisan Hansda @ Raison Hansda v. The State of West Bengal, 2025
The Court reaffirmed the fundamental legal principle that circumstantial evidence requires a strict and complete chain of proof, where each link is crucial to prove the guilt of the accused beyond reasonable doubt.

Judgement Details
Court
Calcutta High Court
Date of Decision
14 July 2025
Judges
Justice Debangsu Basak ⦁ Justice Prasenjit Biswas
Citation
Acts / Provisions
Facts of the Case
- The Appellant was convicted by the Additional Sessions Judge on charges under Sections 364, 302, and 201 IPC for kidnapping, murder, and tampering with evidence.
- The conviction resulted in life imprisonment without remission and a fine of ₹10,000, with a further provision of two years' simple imprisonment in case of default in payment.
- The case was largely based on circumstantial evidence, as there were no eyewitnesses to the crime.
- The prosecution contended that the accused was connected to the crime by three critical links: motive, last seen with the victim, and recovery of the weapon used in the crime. However, the appellant challenged the prosecution’s case, arguing the prosecution failed to establish these three essential links conclusively.
Issues
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Whether the chain of circumstances required to convict based on circumstantial evidence was complete and unbroken?
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Whether the failure to send the recovered weapon for forensic examination affected the prosecution's ability to establish a link between the weapon and the crime?
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Whether the testimony of witnesses, especially relating to ‘last seen’ and seizure memos, was reliable and credible?
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Whether the hostility of key witnesses and inconsistencies in their statements cast reasonable doubt on the prosecution’s case?
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Whether the conviction based on circumstantial evidence met the legal standard of proof beyond reasonable doubt?
Judgement
- The Calcutta High Court held that in cases based purely on circumstantial evidence, the prosecution must establish three vital links in the chain of evidence: motive, last seen, and recovery of the weapon. Since there were no eyewitnesses, the entire case depended on these circumstantial links.
- The Court observed that to secure conviction based on circumstantial evidence, the chain of events must be complete and unbroken — all facts must unequivocally point to the guilt of the accused, leaving no room for any other reasonable hypothesis.
- It was found troubling that a witness who named the victim at the time of the Magistrate’s statement failed to do so during deposition, undermining the credibility of the testimony.
- A critical failure noted by the Court was the investigating officer’s omission to send the recovered weapon for forensic examination. The weapon was recovered days after the incident at the instance of the appellant, but the absence of chemical or forensic analysis meant the Court could not conclusively link the weapon to the crime. The doctor’s opinion that injuries could have been caused by the weapon was held insufficient proof.
- Additionally, witnesses who signed the seizure memo turned hostile, further weakening the prosecution’s story regarding the weapon.
- The Court also held that the ‘last seen’ evidence only established the accused’s presence at a particular time, but failed to complete the chain of circumstances. Testimony from a crucial witness (PW 6) was found not credible.
- Therefore, despite suspicions, the Court found that the prosecution failed to prove guilt beyond reasonable doubt, as the evidence was neither clinching nor conclusive. Accordingly, the Court set aside the conviction and sentence passed by the Trial Court.
Held
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The failure to examine the recovered weapon for forensic evidence is not always fatal but becomes a vital link in circumstantial evidence cases.
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The prosecution must establish a complete chain of circumstances (including motive, last seen, and weapon recovery) without any reasonable doubt.
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Hostile witnesses and absence of forensic linkage weakened the prosecution’s case.
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The conviction based solely on incomplete circumstantial evidence cannot be sustained.
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The appellant’s conviction and sentence were quashed.
Analysis
- The Court reaffirmed the fundamental legal principle that circumstantial evidence requires a strict and complete chain of proof, where each link is crucial to prove the guilt of the accused beyond reasonable doubt.
- This judgment emphasizes the importance of forensic examination in modern criminal trials, especially when the prosecution’s case relies heavily on circumstantial evidence. The absence of scientific proof weakens the prosecution’s case and creates reasonable doubt.
- The decision also highlights the significance of witness credibility, especially in cases without direct eyewitnesses. When witnesses turn hostile or give inconsistent statements, the prosecution’s case suffers.
- The judgment acts as a caution for prosecution agencies to ensure meticulous collection and examination of evidence and to avoid shortcuts like not sending key material for forensic tests. It underscores the judicial safeguards to prevent wrongful conviction when evidence is not conclusive.