I agree with the learned counsel for the Respondent that the Appellant’s counsel had really misunderstood the fundamental requirement in criminal trial. A trial within trial is required in law where the objection to admissibility of a statement is based on the ground that it was not made voluntarily. In that case there has to be a trial within trial to determine the question of voluntariness. It is only where this is proved by the prosecution that the statement is admitted in evidence.
– Galadima, JSC. Kingsley v. State (2016)