The Appellant, a member of the Zimbabwe Republic Police stationed at Plumtree, was charged with contravention of section 89 of the Criminal Law (Codification and Reform Act) for allegedly assaulting a mentally ill man on 13 May 2011. The complainant had been in police custody for malicious damage to property. Upon his release, he demanded food and became violent when given inadequate food. He vandalized property at the police station, breaking windows, jumping through windows, getting into coffins, crawling on flower beds, and hiding under a motor vehicle. The appellant, together with his co-accused John Chimweda, were called to deal with the complainant. The charges against the co-accused were withdrawn after plea despite allegations that he held the complainant down while the appellant assaulted him with a button stick. The complainant, who admitted suffering from a mental disorder and was not well at the material time, filed assault charges two weeks after the incident. A medical report prepared three months later showed a fractured middle finger. The appellant was convicted by the magistrate court and sentenced to 9 months imprisonment with 3 years suspended for 5 years.
The appeal against conviction and sentence was allowed. The conviction and sentence were set aside.
The binding legal principles established are: (1) Under section 246 of the Criminal Procedure and Evidence Act, no person afflicted with mental disorder is competent to give evidence while under the influence of such malady; (2) Under section 245, it is the court's duty to decide on the competency of witnesses and the court must, of its own motion (mero motu), order examination of any witness who appears to have any form of mental disorder; (3) It is illogical and impermissible to acquit one accused on the basis of insufficient evidence and then convict a co-accused on the very same evidence; (4) The State must prove its case beyond reasonable doubt, and if the State fails to do so, the accused must be given the benefit of the doubt and acquitted; (5) Evidence that is fraught with contradictions and inconsistencies has reduced probative value and cannot sustain a conviction beyond reasonable doubt.
The court observed that police officers have an obligation to use minimum force to control violent individuals. The court also commented that the complainant's conduct—being violent, breaking windows, climbing in and out of coffins, and hiding under vehicles—was clearly that of a person afflicted with mental disability who needed to be subdued. The court noted that the complainant could have fractured his finger in numerous ways given his violent behavior, including when throwing bricks, breaking windows, climbing coffins, or clinging underneath a motor vehicle. The court remarked that the magistrate misdirected himself by relying on cases involving police assaulting suspects in custody, when the present case involved a violent person who had "lost his marbles" and needed to be contained.
This case is significant in Zimbabwean criminal procedure and evidence law for establishing important principles regarding: (1) the competency of mentally disordered witnesses under section 246 of the Criminal Procedure and Evidence Act; (2) the court's duty under section 245 to investigate witness competency mero motu (of its own motion) rather than waiting for the State to do so; (3) the principle that an accused cannot be convicted on evidence deemed insufficient to convict a co-accused; (4) the standard of proof beyond reasonable doubt and the need to give the accused the benefit of doubt when evidence is contradictory and inconsistent; (5) the distinction between suspects in custody and violent individuals requiring containment when considering sentencing for police officers; and (6) the probative value of medical evidence prepared long after an incident where multiple possible causes of injury exist.