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PER: Potchefstroomse Elektroniese Regsblad

On-line version ISSN 1727-3781


ALLY, D. Determining the effect (the social costs) of exclusion under the South African exclusionary rule: should factual guilt tilt the scales in favour of the admission of unconstitutionally obtained evidence?. PER [online]. 2012, vol.15, n.5, pp.476-513. ISSN 1727-3781.

Section 35(5) of the Constitution of the Republic of South Africa, 1996 governs the exclusion of unconstitutionally obtained evidence in criminal trials. Three groups of factors must be considered to assess whether unconstitutionally obtained evidence should either be excluded or admitted. This contribution is focussed on the third group of factors (also known as the "effect of exclusion", or the "social costs of exclusion") which consists of the "seriousness of the charge faced by the accused", and the "importance of the evidence to secure a conviction". This group of factors is concerned with the public interest in crime control. Some scholars argue that the "public mood" should be a weighty factor when our courts consider this group of factors. Against this background this article considers three issues: First, whether considerable weight should be attached to the "current mood" of society when our courts weigh and balance this group of factors against other relevant factors; secondly, whether a consideration of the "seriousness of the charge" and the "importance of the evidence for a successful prosecution" could possibly encroach upon the presumption of innocence; and, thirdly, whether factual guilt should be allowed to tip the scales in favour of the admission of unconstitutionally obtained evidence when the evidence is crucial for a conviction on a serious charge.

Keywords : Admissibility of evidence; unconstitutionally obtained evidence; exclusion of unconstitutionally obtained evidence; section 35(5); exclusionary rule; effect of exclusion; presumption of innocence.

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