LEGAL PRINCIPLE: EVIDENCE LAW – Voluntariness of Confession – Time for Challenge

Voluntariness challenges must be raised when the prosecution seeks to tender the confessional statement in evidence—this is the critical moment. At tendering, if the accused challenges voluntariness, a trial within trial (voir dire) is conducted to determine admissibility. This timing requirement serves: ensuring timely determination of admissibility, preventing testimony from being heard before voluntariness is resolved, and maintaining proper procedure. If voluntariness is not challenged at tendering, the statement is admitted, though the accused can still: testify about involuntariness affecting weight (not admissibility), or argue on appeal that the trial court should have raised voluntariness sua sponte if obvious. The principle establishes the procedural moment for raising voluntariness—when the statement is offered into evidence. Late challenges (after admission) are procedurally improper, though courts may consider obvious involuntariness. This promotes orderly trials with admissibility determined before prejudicial evidence enters.