PRINCIPLE STATEMENT

It is not in every case where the accused challenges their confessional statement that a trial within trial must be held; it is only held where the issue is voluntariness but not the making of the statement simpliciter; trial within trial is not required unless the issue of voluntariness is clearly raised.

RATIO DECIDENDI (SOURCE)

Per Belgore, JSC, in Nwangbomu v. The State (1994) NLC-2881991(SC) at P. 4; Para E – P. 5; Para A.
"It is thus not in every case the accused challenges his statement confessing the commission of the offence that a trial within trial must be held; it is only held where the issue is voluntariness but not the making of the statement simpliciter. It is therefore not required in law to hold trial within trial to test a confession unless the issue of voluntariness is clearly raised."
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EXPLANATION / SCOPE

Trial within trial (voir dire) is a special procedure for determining confession voluntariness in the absence of the jury (or as a preliminary matter in non-jury trials). It’s required only when voluntariness is challenged—specifically questioning whether the confession was obtained through force, threats, promises, inducements, or oppressive circumstances. Challenges to statement authenticity (“I didn’t make it”) don’t require trial within trial—they’re resolved through normal fact-finding. The accused must “clearly raise” voluntariness—explicitly or implicitly questioning the circumstances of confession-making. Vague or general challenges may not trigger trial within trial. This procedure protects accused from involuntary confessions while avoiding unnecessary preliminary proceedings when voluntariness isn’t genuinely in issue. It ensures proper focus on voluntariness when that specific issue arises.

CASES APPLYING THIS PRINCIPLE