Chintambaramma & Anr. v. State of Karnataka
Background
Chintambaramma (mother-in-law) and Saraswathi (sister-in-law) of a woman named Sahitya were convicted of murdering her under Section 302 read with Section 34 IPC and sentenced to life imprisonment. The prosecution's original theory was that the appellants conspired with two other men (who were never caught) to kill Sahitya over dowry demands, but the trial court found no evidence of dowry harassment and acquitted those alleged co-conspirators along with others. The High Court, while acquitting Sahitya's husband, still upheld the appellants' conviction, but on a completely different theory than what the prosecution had ever charged: that the appellants themselves, alone, were the killers.
Decision Breakdown
The Supreme Court allowed the appeal and acquitted both women. It held that the charge actually framed against the appellants was conspiracy with the two absconding men to commit murder: a charge that both the trial court and High Court found unproved. Since the prosecution's own circumstantial evidence (including a witness who saw two unidentified men, "Swamis," present around the time of death) did not form an unbroken chain pointing only to the appellants, and since the High Court had effectively convicted them of an offence (direct murder, without conspiracy) for which they were never charged, the conviction caused real prejudice and could not stand.
Lesson Learnt
An accused person can only be convicted of the offence they were actually charged with and given a fair chance to defend against: a court cannot uphold a conviction by silently switching to a different theory of guilt than the one the prosecution put forward at trial.