Director of Public Prosecutions, Western Cape v Killian

The respondent, Paul Killian, was interrogated at a compulsory statutory inquiry under the Investigation of Serious Economic Offences Act 117 of 1991, where he had no right to silence or against self-incrimination. The inquiry was conducted by Mr Estié, who later compiled a report recommending prosecution. Killian was subsequently charged and convicted in a regional court on one count of fraud and 23 counts of theft. During the trial, the original prosecutor fell ill and Mr Estié took over the prosecution and cross-examined Killian. Killian brought review proceedings arguing that his trial was unfair because the same person who compelled his testimony at the inquiry later prosecuted him, allegedly using knowledge gained from the inquiry.

The appeal succeeded. The order of the Cape High Court was set aside and replaced with an order dismissing the review application. No costs order was made against the respondent.

This case clarifies South African law on fair trial rights by confirming that a prosecutor’s prior role in a compulsory statutory inquiry does not per se render a later criminal trial unfair. It affirms a fact-specific, substantive approach to fairness under section 35(3) of the Constitution and rejects an automatic exclusionary rule based on prosecutorial dual roles.