The Director of Public Prosecutions, Western Cape v Paul Killian

The respondent (Paul Killian) was convicted in a regional court on one count of fraud and 23 counts of theft. Prior to his criminal trial, he was interrogated at a statutory inquiry conducted under the Investigation of Serious Economic Offences Act 117 of 1991. At this inquiry, he was denied the right to silence and the right against self-incrimination, being compelled under section 5(10)(b) and (c) to be sworn and answer all questions fully. The inquiry was conducted by Mr T Estié, who compiled a report recommending that Killian be prosecuted. During the criminal trial, the prosecutor Mr P Snyman fell ill, and Mr Estié took over the prosecution, completing the State's case and cross-examining Killian when he testified in his defence. Killian was represented by counsel at both the inquiry and the trial. No objection was raised during the trial to Mr Estié's dual role. Killian later instituted review proceedings claiming the trial was unfair because the prosecutor had interrogated him at the earlier inquiry where he was compelled to answer questions. The High Court found in Killian's favour, holding that the dual role and the prosecutor's possession of the inquiry transcript constituted irregularities that vitiated the trial.

• Whether a criminal trial is fundamentally unfair where the prosecutor also interrogated the accused at an earlier statutory inquiry at which the accused was denied the right to silence and the right against self-incrimination
• Whether the prosecutor's possession of the inquiry transcript and the accused's sworn testimony renders the subsequent trial unfair
• Whether the prosecutor's dual role as interrogator and prosecutor constitutes bias or lack of impartiality
• Whether the absence of objection by the accused during trial is relevant to determining fairness
• The scope of the constitutional right to a fair trial under section 35(3) of the Constitution

The appeal was allowed. The order of the High Court was set aside and substituted with an order dismissing the application. No costs order was made in either court, given that the respondent was seeking to enforce his constitutional right to a fair trial and the issue was whether that right had been infringed.

A criminal trial is not unfair, fundamentally or at all, simply because the prosecutor also interrogated the accused at an earlier statutory inquiry at which the latter was denied the right to silence and the right against self-incrimination. Whether such a dual role involves or creates substantive unfairness in a criminal trial is a matter to be decided on the facts of each case by the trial court. Unfairness does not flow axiomatically from a prosecutor having had that dual role. Additional knowledge and understanding obtained by a prosecutor in an investigatory position cannot amount to bias or prejudice per se. The prosecution's possession of an inquiry record and transcript does not inherently prejudice trial fairness where: (a) there is no direct use of the compelled inquiry testimony at trial; (b) there is no derivative evidentiary use of such testimony; and (c) the trial court maintains control over the permissible use of derivative evidence to ensure fairness.

The Court observed that: (1) If the Constitutional Court's approach in Ferreira v Levin NO regarding derivative use of evidence applies to evidential derivative use, it must equally apply to non-evidential derivative use; (2) In cases involving impecunious accused persons unable to afford legal representation at inquiry or trial, a trial court would be obliged to exercise extra vigilance to ensure maintenance of required fairness; (3) To the extent that fairness may depend on an accused's subjective view of proceedings, a court cannot be expected in the absence of objection to guess what that view is if there are no facts or circumstances that should reasonably prompt inquiry; (4) While there is no onus on an accused and no waiver of the right to a fair trial, the absence of objection by a defended accused is a factor that can reasonably induce the court to infer that the accused has no intention to allege prosecutorial unfairness; (5) In constitutional litigation concerning enforcement of constitutional rights, courts may decline to award costs even where the party asserting the right is unsuccessful; (6) The Court noted that the constitutionality of the relevant provisions of the Investigation of Serious Economic Offences Act was challenged but this challenge was abandoned on appeal.

This case is significant in South African criminal procedure and constitutional law for establishing that a prosecutor's dual role as both pre-trial interrogator at a statutory inquiry (where the accused was compelled to testify) and subsequent trial prosecutor does not axiomatically render the criminal trial unfair. The judgment clarifies that: (1) The constitutional right to a fair trial under section 35(3) extends beyond procedural formalities to substantive fairness; (2) Fairness in such circumstances must be assessed on the facts of each individual case rather than being determined by a blanket rule; (3) The prohibition on direct use of compelled testimony and the trial court's gatekeeping role regarding derivative use provide adequate safeguards for trial fairness; (4) Additional knowledge gained by a prosecutor in an investigatory capacity does not constitute bias or partiality per se; (5) The case provides guidance on how courts should assess fairness claims in the context of statutory inquiries under legislation like the Investigation of Serious Economic Offences Act and its successor, the National Prosecuting Authority Act. The judgment balances the constitutional right to a fair trial with the practical needs of prosecuting serious economic crimes following statutory inquiries.