Dev Kanya Tiwari v. The State of Uttar Pradesh Home Department Secretary
Background
The appellant (mother-in-law of the deceased's wife) was convicted under Section 302/34 IPC for the murder of her son-in-law, Brij Bhushan Tiwari, based on a complaint by the deceased's brother alleging the in-laws had strangled him. Both the trial court and the Allahabad High Court upheld the conviction and life sentence. The defence maintained throughout that the deceased had actually died by suicide after consuming poison.
Decision Breakdown
The Supreme Court noted the case rested entirely on circumstantial evidence and on the testimony of the deceased's brother, which the trial court itself had partly disbelieved. Critically, the post-mortem doctor had not preserved the deceased's viscera for chemical analysis despite an existing complaint (filed by the deceased's wife before the brother's complaint) stating the deceased had told a doctor he had consumed poison and did not want to be saved: a statement corroborated by three independent witnesses and the investigating officer. The Court held the prosecution had failed to establish a complete chain of circumstances excluding the hypothesis of suicide, and that the benefit of this reasonable doubt should have gone to the accused.
Lesson Learnt
In cases built solely on circumstantial evidence, the prosecution must exclude every reasonable alternative explanation, including one favourable to the accused; a failure to preserve key forensic evidence (like viscera for poisoning tests) can be fatal to a conviction.