Thwala v The State

Oscar Vusi Thwala was convicted in the High Court, Gauteng Division, Pretoria in 2003 on two counts of abduction, three counts of rape and two counts of possession of a firearm and ammunition. He received three life sentences for rape with aggravating circumstances and nine years imprisonment for the remaining charges. Leave to appeal was denied in 2005. He applied unsuccessfully to the Supreme Court of Appeal in 2012 while unrepresented. In 2015, now represented, he was granted leave to appeal to the Full Court, but the Supreme Court of Appeal withdrew this order noting it was functus officio. He applied to the Constitutional Court in 2016 while unrepresented and was dismissed for lack of prospects of success. In 2017, represented by Lawyers for Human Rights, he applied again to the Constitutional Court raising additional grounds including: the trial was conducted in Afrikaans when neither he nor his representative understood the language; he was not informed of the Minimum Sentences Act until sentencing; the Judge's hostile interventions violated his right to a fair trial; DNA evidence was not properly considered; and sentencing proceedings were irregular.

• Whether the res judicata doctrine should be relaxed to permit reconsideration of a matter already finally determined by the Constitutional Court
• Whether the applicant's right to a fair trial under section 35(3) of the Constitution was violated
• Whether conducting proceedings in Afrikaans with interpretation provided constituted unfairness
• Whether failure to inform the accused of the applicability of the Minimum Sentences Act until sentencing constituted unfairness
• Whether the trial Judge's interventions rendered the trial unfair
• Whether DNA evidence not matching the applicant was material to the conviction
• Whether the sentencing proceedings complied with the requirements set out in Rammoko

1. The application for condonation is granted. 2. Leave to appeal is refused.

The binding legal principles established are: (1) Res judicata applies in criminal appeals to prevent reconsideration of matters already finally determined, and an accused generally may not appeal against conviction or sentence more than once despite changing grounds of appeal. (2) The exceptional circumstances recognized in Molaudzi for relaxing res judicata require a demonstration that significant or manifest injustice would result if the order is allowed to stand, not merely that the applicant was previously unrepresented or raises new grounds. (3) A criminal appeal cannot be res judicata in some respects and appealable in others - it must be considered as a whole. (4) In gang rape cases, DNA evidence not matching a particular accused is not necessarily material where other evidence convincingly implicates that accused. (5) Conducting trial proceedings in a language not understood by the accused does not automatically violate section 35(3)(k) where interpretation is provided and the accused is legally represented.

The Court made several non-binding observations: (1) The trial Judge's interventions and comments were described as "unfortunate" though not sufficient to render the trial unfair. (2) The Court noted policy considerations underlying res judicata including the need for finality on conviction and protecting courts from unending, frivolous litigation. (3) The Court emphasized that it relaxed res judicata in Molaudzi "with great circumspection" and warned that "the rule of law and legal certainty will be compromised if the finality of a court order is in doubt and can be revisited in a substantive way." (4) The Court observed that even if extensive evidence were led regarding whether the applicant's attorney informed him of the charge sheet contents, it would be unlikely to resolve the factual dispute and then satisfy the further requirement that this rendered sentencing unfair.

This case reinforces the importance of the res judicata doctrine in criminal appeals, particularly the general rule against appealing a conviction or sentencing more than once regardless of changed grounds. It clarifies that the exceptional circumstances recognized in Molaudzi for relaxing res judicata are narrow and require manifest injustice, not merely new grounds raised by a previously unrepresented applicant. The case demonstrates the Court's vigilant protection of finality in criminal proceedings while still examining allegations of unfairness. It also confirms that proceedings conducted in a language other than that understood by the accused, where interpretation is provided and the accused is legally represented, does not automatically violate the right to a fair trial under section 35(3)(k) of the Constitution. The judgment emphasizes that unrepresented status alone does not constitute exceptional circumstances warranting departure from res judicata.