As per case facts, the appellants were convicted under Section 364 and 120B of the IPC for the alleged abduction of a victim, stemming from a prior altercation and the ... victim being last seen with the accused. The appellants appealed, contending that the conviction was based on mere suspicion, relied on unreliable interested witness testimony without corroboration, and suffered from a flawed investigation lacking direct evidence. The question arose whether a conviction could be sustained solely on circumstantial evidence, particularly the "last seen" theory provided by interested witnesses, when there was a lack of independent corroboration, material contradictions, and significant investigative infirmities, failing to complete the chain of incriminating circumstances. Finally, the High Court determined that the prosecution's case relied entirely on circumstantial evidence, mainly the "last seen" theory from closely related and thus interested witnesses. The court emphasized that such testimony requires strict scrutiny and independent corroboration, which was absent. Crucially, the investigation suffered from serious infirmities, including questionable recovery of articles without proper identification and unsubstantiated claims by the Investigating Officer regarding his travels. There was no conclusive link from the "last seen" occurrence to the victim's disappearance, no recovery of a dead body, and no scientific evidence connecting the accused to the offense. The court concluded that the incomplete chain of circumstances left reasonable doubt, reaffirming that strong suspicion cannot replace proof beyond reasonable doubt, and therefore, the conviction was set aside, and the appellants were acquitted.