Introduction
In any legal system, the primary objective of a trial is the ascertainment of truth through the presentation of evidence. The general rule is that all evidence which is relevant to the facts in issue is admissible before the court (Schwikkard and Van der Merwe, 2016). However, this principle is not absolute. The law of evidence recognises that the pursuit of truth must sometimes yield to other, more compelling public policy considerations. One of the most significant limitations on the admissibility of evidence is the doctrine of privilege. Privilege grants a person the right to withhold evidence from a court, even if that evidence is relevant and would otherwise be admissible. This essay will discuss the principles of privileged communications and confidentiality as espoused in the Zimbabwean law of evidence. It will begin by outlining the general nature of privilege before focusing specifically on matrimonial privilege, the privilege against self-incrimination, and public interest privilege, with reference to Zimbabwean statute and case law.
The concept of privilege is rooted in the protection of particular relationships and societal values that are deemed more important than the court’s access to every piece of potential evidence. Confidentiality is a related but distinct concept. It is an ethical or contractual duty to keep information private, whereas privilege is a legal right to refuse to disclose information in legal proceedings. A communication may be confidential without being privileged, but all privileged communications are, by their nature, confidential. The Zimbabwean law of evidence, which is a hybrid of Roman-Dutch common law and English law principles, codifies several of these privileges in the Civil Evidence Act [Chapter 8:01] and the Criminal Procedure and Evidence Act [Chapter 9:07] (hereinafter CPEA).
i) Matrimonial Privilege
Matrimonial privilege is designed to protect the sanctity and confidence of the marital relationship. The law recognises that open and honest communication between spouses is essential for a healthy marriage and that compelling one spouse to reveal such confidences in court could irreparably damage the relationship. This privilege is not about the competence of a spouse to testify but about the non-compellability of disclosing specific communications.
In Zimbabwe, the privilege is governed by section 8(1) of the Civil Evidence Act for civil cases and section 287 of the CPEA for criminal cases. Section 8(1) of the Civil Evidence Act states that “a person shall not be compelled to disclose any communication made to him or her by his or her spouse during the subsistence of the marriage.” This provision is clear: the privilege belongs to the spouse who received the communication. They cannot be forced to disclose what their partner said to them in confidence during the marriage. It is important to note that the communication must have been made during the marriage for the privilege to apply. However, the privilege continues even after the marriage has ended through divorce or death, as long as the communication itself occurred during the marriage (Hoffmann and Zeffertt, 1988).
The rationale was discussed in the Zimbabwean case of S v Le-fait 1973 (2) RLR 284 (A), which affirmed the principle of protecting marital confidences. The court recognised that forcing spouses to testify about their private conversations would undermine the trust that is fundamental to the marital union. The privilege covers private communications of any kind between the spouses, whether oral or written, but it does not extend to actions or conduct observed. For instance, if a wife sees her husband cleaning a blood-stained knife, she can be compelled to testify about this observation, as it is not a "communication" from him to her. The privilege only protects what is said or written between them. The spouse holding the privilege (the recipient) can choose to waive it and disclose the communication, but they cannot be compelled to do so.
ii) The Privilege Against Self-Incrimination
The privilege against self-incrimination is a cornerstone of the adversarial system of justice, encapsulated in the Latin maxim nemo tenetur se ipsum accusare, meaning "no one is bound to accuse himself." It provides that a person cannot be compelled to give evidence or answer any question in court if the answer would have a tendency to expose them to a criminal charge. This right is fundamental to protecting individual liberty against the power of the state.
In Zimbabwe, this privilege is provided for in section 10 of the Civil Evidence Act and section 293 of the CPEA. Section 293 of the CPEA states that no witness in a criminal proceeding shall be compelled to answer any question which he would not be compelled to answer in a civil case. This incorporates the civil rule, found in section 10(1) of the Civil Evidence Act, which protects a witness from being compelled to give evidence that would "expose him to a criminal charge." The rationale is to prevent the use of coercion to extract confessions, uphold the presumption of innocence, and maintain a fair balance between the state and the individual.
To claim the privilege, a witness must be under oath and must state that they genuinely believe their answer would incriminate them. The court must then decide whether the witness's fear of incrimination is reasonable in the circumstances. The danger must be real and appreciable, not a remote or fanciful possibility. The case of S v Limbada 1958 (2) SA 481 (A), a South African authority often cited in Zimbabwe, established that the court must be satisfied from the circumstances of the case and the nature of the evidence the witness is called to give, that there is a reasonable ground to apprehend danger. A Zimbabwean example can be found in Ex Parte Acting-Sheriff, Salisbury 1969 (1) RLR 91, where the court had to determine whether witnesses in an inquiry could refuse to answer questions on the grounds of potential incrimination. The privilege is a personal one that must be claimed by the witness themselves; the court will not automatically apply it. It is a crucial protection that ensures individuals are not forced to become instruments of their own prosecution.
iii) Public Interest Privilege
Public interest privilege, sometimes referred to as state privilege, is a rule of evidence that allows the state to withhold evidence from legal proceedings if its disclosure would be contrary to the public interest. This privilege is not for the benefit of an individual but for the protection of the public as a whole. It often applies to information concerning national security, defence, international relations, high-level government policy, and the identity of police informers.
The privilege is recognised in section 11 of the Civil Evidence Act and section 296 of the CPEA. Section 296(2) of the CPEA states that a court may not compel the disclosure of evidence if a Minister certifies that its disclosure would be "prejudicial to the security of the State." For a long time, Zimbabwean courts followed the English case of Duncan v Cammell Laird & Co Ltd [1942] AC 624, which held that a Minister's statement that disclosure would harm the public interest was conclusive and could not be questioned by the courts.
However, the modern approach in Zimbabwe, as in other Commonwealth jurisdictions, has shifted significantly. The courts now have the power and duty to perform a balancing exercise. They must weigh the public interest in the non-disclosure of the information against the public interest in the proper administration of justice, which requires that courts have access to all relevant evidence to reach a just decision. The landmark case in this regard is Minister of Information, Posts and Telecommunications v The Associated Newspapers of Zimbabwe (Private) Limited 2002 (1) ZLR 450 (S). In this case, the Supreme Court of Zimbabwe rejected the absolute stance of Duncan and held that it is for the court, not the executive, to make the final decision. The court must inspect the evidence in private and balance the competing interests.
A specific facet of this privilege is the protection of police informers' identities. The courts have long held that disclosing the identity of an informer could endanger them and deter others from providing information to the police in the future. In S v Nkomo 1975 (2) RLR 14 (GD), the court emphasised the importance of protecting informers to assist in the detection and prevention of crime. However, this privilege is also not absolute. If the disclosure of the informer's identity is essential to establish the innocence of the accused, the court may order the disclosure, again demonstrating the balancing act at the heart of public interest privilege.
Conclusion
The law of evidence in Zimbabwe, like that of other common law jurisdictions, navigates a complex terrain where the search for truth is balanced against other fundamental societal values. The general principle of admitting all relevant evidence is subject to important exceptions in the form of privilege. Matrimonial privilege fosters trust and confidence within marriage by protecting private communications between spouses. The privilege against self-incrimination protects individual liberty by ensuring that no person is compelled to contribute to their own conviction. Finally, public interest privilege protects the effective functioning of the state, while the courts retain the ultimate authority to balance this against the need for justice. These principles, enshrined in the Civil Evidence Act and the Criminal Procedure and Evidence Act and developed through case law, demonstrate that the law of evidence is not merely a set of technical rules but a reflection of the society's core values.
References
Associated Newspapers of Zimbabwe (Private) Limited v Minister of Information, Posts and Telecommunications 2002 (1) ZLR 450 (S).
Civil Evidence Act [Chapter 8:01].
Criminal Procedure and Evidence Act [Chapter 9:07].
Duncan v Cammell Laird & Co Ltd [1942] AC 624.
Ex Parte Acting-Sheriff, Salisbury 1969 (1) RLR 91 (GD).
Hoffmann, L. H. and Zeffertt, D. T. (1988) The South African Law of Evidence. 4th edn. Butterworths.
Schwikkard, P. J. and Van der Merwe, S. E. (2016) Principles of Evidence. 4th edn. Juta.
S v Le-fait 1973 (2) RLR 284 (A).
S v Limbada 1958 (2) SA 481 (A).
S v Nkomo 1975 (2) RLR 14 (GD).
