Law of Evidence in Nigeria

Introduction

The law of evidence in Nigeria is codified principally in the Evidence Act 2011, which repealed and replaced the Evidence Act Cap E14, LFN 2004. The 2011 Act introduced significant reforms, particularly regarding electronic evidence, while maintaining the fundamental rules governing admissibility, burden of proof, presumptions, and the examination of witnesses. The law of evidence applies uniformly across Nigeria’s federal and state courts, providing a consistent framework for the determination of facts in both civil and criminal proceedings.

The Evidence Act 2011

The Evidence Act 2011 is divided into several parts addressing relevancy of facts (Part I), proof (Part II), production and effect of evidence (Part III), and miscellaneous provisions. Section 1 provides that evidence may be given in any suit of the existence or non-existence of every fact in issue and of relevant facts. The Act codifies both common law evidentiary principles and statutory modifications, with section 5 preserving the court’s inherent discretion to admit or exclude evidence in the interests of justice.

Admissibility of Evidence

The fundamental rule of admissibility, stated in section 3, is that evidence of a relevant fact is admissible unless excluded by the Act or any other law. Relevancy is defined by sections 4 through 18, which identify categories of relevant facts, including facts forming part of the same transaction, facts that are the occasion, cause, or effect of facts in issue, and facts that establish motive, preparation, or conduct. The court must determine relevancy as a preliminary question, and irrelevant evidence is inadmissible as a matter of law.

Hearsay Evidence

Section 38 defines hearsay and establishes the general rule that hearsay evidence is inadmissible. The Act provides numerous exceptions to the hearsay rule, including admissions and confessions (sections 19-32), statements made in the ordinary course of business (section 39), declarations as to public rights (section 40), declarations as to pedigree (section 42), and declarations by testators (section 44). Dying declarations are admissible under section 33 in prosecutions for homicide where the declarant’s death is the subject of the charge.

Electronic Evidence

The Evidence Act 2011 was groundbreaking in its comprehensive treatment of electronic evidence. Section 84 provides that electronic evidence is admissible if the device from which the evidence is produced was operating properly and the evidence was not improperly interfered with. The court may require a certificate from a qualified person confirming the device’s reliability. The Supreme Court in Kubor v Dickson (2013) 4 NWLR (Pt 1345) 534 established guidelines for the admissibility and evaluation of electronic evidence, emphasizing the need for proper authentication and the reliability of the electronic process.

Burden of Proof

The burden of proof is fundamental to the adversarial system. Section 131 provides that whoever desires any court to give judgment as to any legal right or liability dependent on the existence of facts which they assert must prove that those facts exist. In criminal cases, the prosecution bears the legal burden of proving guilt beyond reasonable doubt, as established in Woolmington v DPP (1935) AC 462 and affirmed by the Supreme Court in Bakare v State (1987) 1 NWLR (Pt 52) 579.

Presumptions

The Evidence Act establishes various presumptions that shift the burden of producing evidence. Section 145 creates a presumption of innocence. Sections 146 through 169 address presumptions of fact and law, including the presumption of legitimacy (section 148), presumption of death after seven years (section 146), and presumptions relating to documents (sections 150-169). Statutory presumptions in criminal law, such as the presumption of possession of stolen property from recent possession, play a significant role in prosecutions.

Witnesses and Testimony

Part III of the Evidence Act governs the examination of witnesses. Section 175 states that all persons are competent to testify unless the court considers them incapable of understanding the questions or giving rational answers. The Act addresses the competency of children, persons with mental disabilities, and spouses of parties. Sections 179 and 180 protect witnesses from incriminating themselves. The Act also codifies the rules of examination-in-chief, cross-examination, and re-examination, including rules on leading questions, refreshing memory, and impeachment of credit.

Character Evidence

The rules governing character evidence distinguish between criminal and civil proceedings. Section 76 provides that in criminal proceedings, evidence of the accused’s bad character is inadmissible unless the accused first introduces evidence of good character or the nature of the defense attacks the character of the prosecutor or witnesses. Section 77 addresses evidence of similar facts, which is admissible only where its probative value outweighs its prejudicial effect.

Conclusion

The Evidence Act 2011 provides a comprehensive and modern framework for the law of evidence in Nigeria, successfully integrating traditional evidentiary rules with contemporary provisions for electronic evidence. The Act maintains the essential safeguards of the adversarial system while adapting to technological change. Nigerian courts continue to develop evidentiary principles through interpretation of the Act, contributing to a coherent and predictable body of evidence law.