The case of Kashmira Singh v. State of Madhya Pradesh (1952) is a landmark judgment that clarifies the evidentiary value of a confession made by a co-accused under Section 30 of the Indian Evidence Act. The Supreme Court authoritatively held that such a confession is not substantive evidence against the other accused persons. It can only be used to corroborate other evidence on record. The court cannot start with the confession and then look for corroboration; it must first consider all other evidence and only if it is satisfied, it may look to the confession to lend assurance to its conclusion.