A tainted witness falls into one or both of the two categories hereunder listed: (1) A witness who is an accomplice in the crime charged. (2) A witness who, by the evidence he gives, may and could be regarded as having some purpose of his own to serve. Rasheed Olaiya v. The State (2010) Vol. 180 LRCN 1-197 p.34; The State v. Dominic Okoro & Ors (1974) 2 SC 73 at 82; Ishola v. The State (1978) 9-10 SC 73 at 100 .
— N.S. Ngwuta, JSC. Odogwu v State (2013) – SC.122/2009
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A vital witness is a witness whose evidence may determine the case one way or the other and failure to call a vital witness is fatal to the prosecution s case. In other words, a witness who knows something significant about a matter is a vital witness. In Onah v. State (1985) 3 NWLR Pt. 12 Pg.236 a vital witness was described as a witness whose evidence may determine the case one way or the other and it is settled that the failure to call such a witness is fatal to the prosecution’s case.
– H.M. Ogunwumiju, JSC. State v. Ibrahim (2021) – SC.200/2016
No doubt, the prosecution is only obliged to call witnesses whose evidence is vital to the determination of the case for the prosecution and whose evidence would settle vital points of facts one way or the other to remove any element of doubt in respect of the guilt of the Defendant from the case of the prosecution.
– H.M. Ogunwumiju, JSC. State v. Ibrahim (2021) – SC.200/2016
A court has a duty to disallow a question which is not relevant to the proceedings; but a question which is relevant can freely be put to a witness and must be answered, although the weight to be attached to the answer is an entirely different matter. Thus relevance and admissibility are closely knit together while the question of weight appertains to the province of evaluation and should, as always, be kept in separate compartment.
– Achike JCA. Adeyemi v. Edigin (1990)
Thus, in considering and ascribing probative values to the evidence of witnesses, a Court is under duty to appraise it to see whether they are admissible, cogent, credible and probable. Thus, in the discharge of this onerous but very essential duty, a Court will be wary of crediting any witness who has either been so discredited or his so inconsistent on material facts in contention between the parties. It is for this reason that it is settled law that no witness who has given materially inconsistent evidence on oath is entitled to the honour of credibility and such a witness does not deserve to be treated as a truthful witness. See Ezemba v. Ibeneme (2009) 14 NWLR (Pt. 789) 623.
— B.A. Georgewill JCA. Stanbic IBTC Bank Plc V. Longterm Global Capital Limited & Ors. (CA/L/427/2016, 9 Mar 2018)
Where the evidence of such a witness is otherwise credible and sufficiently of probative value to the charge, the fact of his relationship to the victim or that he has other personal interest of his own to serve is by itself not sufficient to reject his evidence. In law, causes are not lost on the basis that the witness/s is/are members of the same family, association or community. Even where the Court fails or omits to caution or warn itself on evidence that is true in fact and sufficient to ground a charge, the failure or omission would not weaken the validity of such evidence or be fatal to a conviction.
– M.L. Garba JCA. Odogwu v. Vivian (2009) – CA/PH/345/05
This court has stated in a legion of cases that where the evidence of an accused person is the only witness of an event, any other evidence given by another person not being an eye witness to that particular event will be hearsay or speculative. I commend the decision of this court in Ahmed v. State (1999) 7 NWLR (Pt. 612) 641 at 675 Belgore, JSC while allowing the appeal stated as follows: “In a situation where only the evidence of the accused person as to the actual stabbing is the only eye-witness account, he is either believed or there is no other evidence to believe.” Also in Bassey v. State (2019) 18 NWLR (Pt. 1103) 160 at page 166, para. F, Abba Aji, JSC while allowing the appeal stated as follows: “the testimony of appellant appears to me very striking and believable since there was no eye witness to the crime except the story of the appellant herein. His evidence seems consistent and correlated.”
Enobong v. The State (2022) – SC/CR/249/2020
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