The law is trite that in circumstance where the prosecution seeks to tender the confessional statement of an accused person and it is objected to and challenged on the ground that it was not made voluntarily, a trial within trial is conducted for the sole purpose of finding out if the statement was made voluntarily or whether the confessional statement was extracted from the accused by force or threat of punishment or by any form of inducement. If at the end of the trial within trial the trial Judge is satisfied that the confessional statement was not voluntary, such a statement is not admissible in evidence. If on the other hand the statement is adjudged voluntarily made, it is admitted in evidence. In both cases the trial Judge should rule on it accordingly and that brings the trial within trial to an end and the main trial continues. SeeIbeme v The State (2013) 10 NWLR (pt 1362) 333, Solola & Anor v State (2005) 11 NWLR (pt 937) 460, Federal Republic of Nigeria v Iweka (2013) 3 NWLR (pt 1341) 285.
— J.I. Okoro, JSC. Chibuike Ofordike V. The State (SC.695/2016, 2019)