The State v Nkululeko Sidney Katoo

The respondent was charged in the High Court (Port Elizabeth) with kidnapping and rape (alternatively sexual intercourse with an imbecile under s 15(1)(a) of the Sexual Offences Act 23 of 1957). The complainant was a 16-year-old female who lived with her parents in Hankey. On 13 July 2001, she disappeared from outside her home and was found the next morning with the respondent in his room. Medical examination revealed she had recently had sexual intercourse. The respondent admitted to having sexual intercourse with her but claimed it was consensual. A clinical psychologist, Mr du Toit, examined the complainant and found she suffered from severe mental retardation (described as imbecility), with a mental age of a four-year-old child. The trial judge ruled that the complainant was incompetent to testify under s 194 of the Criminal Procedure Act 51 of 1977, and the respondent was acquitted on both counts after the state closed its case. The state sought to reserve the question of law regarding the competence ruling.

• Whether the trial court was correct in law in refusing the state an opportunity to present the evidence of the complainant on the charges preferred
• The proper interpretation and application of s 194 of the Criminal Procedure Act 51 of 1977 regarding the competence of witnesses afflicted with mental illness or imbecility
• Whether imbecility per se renders a witness incompetent to testify
• Whether the trial court had a duty to properly investigate the cause of the complainant's imbecility before ruling on competence
• Whether the requirements of s 227(2) regarding evidence of previous sexual experience were complied with

1. The application for the reservation of the question of law was granted in terms of s 317(5) of the Criminal Procedure Act. 2. The reserved question of law was answered in the affirmative (the trial court erred in refusing the state the opportunity to present the complainant's evidence). 3. Under s 324 of the Act, the respondent may be retried on count 2 (rape/sexual intercourse with an imbecile) only. The acquittal on count 1 (kidnapping) was not affected.

Section 194 of the Criminal Procedure Act 51 of 1977 requires two cumulative requirements to be satisfied before a witness is incompetent: (1) the witness must appear or be proved to suffer from mental illness or imbecility of mind due to intoxication, drugs or the like; and (2) as a direct result, the witness must be deprived of the proper use of his or her reason. Imbecility per se does not disqualify a witness from testifying; only imbecility induced by intoxication, drugs or similar causes falls within the scope of s 194. Trial courts have a duty under s 193 to properly investigate and enquire into the competence of a witness before ruling them incompetent, either through medical evidence or by allowing the witness to testify so the court can assess their competence. The presumption in s 192 is that every person is competent to give evidence unless expressly excluded by the Act. Competence to testify (s 194) is distinct from the ability to understand the nature and import of the oath (s 164).

The court made several obiter observations. It repeated the admonition on the importance of lower courts following decisions of higher courts, citing S v J (which was binding on the trial court), and emphasized that disregarding higher court decisions wastes resources and imperils public understanding by creating an impression of incoherence and unpredictability. The court noted that the state's intention was not necessarily to rely on the truth of the complainant's evidence but to demonstrate to the court that she was an imbecile and that this would have been apparent to anyone—a procedure akin to an inspection in loco. The court criticized the trial court for allowing evidence of the complainant's previous sexual experience without complying with s 227(2), emphasizing that courts must vigilantly protect complainants' privacy and dignity by allowing such evidence only where statutory requirements are met. The court also noted that the trial court erred by treating the defense version put in cross-examination as if it were evidence when considering the verdict, stating that since the respondent failed to give evidence, the verdict should have been based solely on the prosecution's evidence.

This case provides authoritative guidance on the interpretation of s 194 of the Criminal Procedure Act 51 of 1977 regarding witness competence. It clarifies that mental disability or imbecility per se does not render a witness incompetent and that courts must properly investigate the cause of imbecility before making competence rulings. The judgment reinforces the presumption of competence in s 192 and the duty of trial courts to conduct proper enquiries under s 193. It distinguishes between competence to testify (governed by s 194) and the separate issue of understanding the oath (governed by s 164). The case also emphasizes the importance of lower courts following binding precedent from higher courts and protecting complainants' privacy by strictly applying s 227(2) regarding evidence of previous sexual experience. It demonstrates the court's commitment to ensuring vulnerable witnesses, including those with mental disabilities, are not automatically excluded from the justice system.