Reasonable and Probable Cause in the Law of Malicious Prosecution: A Review of South African and Commonwealth Decisions
Bibliographic record
Abstract
The requirement that the plaintiff in an action for malicious prosecution must prove a lack of reasonable and probable cause to initiate, instigate or continue the prosecution on the part of the instigator or prosecutor is one of the four elements of that cause of action. It is a vital link between the lawfulness of the prosecution and the state of mind of the defendant. Again, whether a prosecution is wrongful or lawful depends on whether there was a reasonable and probable cause coupled with the animus iniuriandi of the defendant in instigating, initiating or continuing it. It is not whether the prosecutor possessed evidence to secure a conviction since that is for the trial court to decide after the conclusion of evidence; but, the honest belief by the prosecutor that, having carefully collected and objectively assessed the available information, the plaintiff was probably guilty of the crime. In coming to that decision the prosecutor must have grappled with both the subjective and objective elements in the exercise of that discretion. The Australian High Court judgment in A v New South Wales 2007 230 CLR 500 (HCA) has brought clarity to this aspect of the problem. However, as this paper contends, the ten-point guidelines enunciated by that court in that case and designed to provide the courts with a seemingly less complicated formula for determining if the prosecutor lacked reasonable and probable cause do not appear to have provided the panacea to the problem. Meanwhile, the distinct nature of the requirement of reasonable and probable cause is made clearer when it is compared with reasonable ground to arrest in the case of wrongful arrest and the tort of abuse of process. Also problematic and equally challenging is identifying where a reasonable and probable cause inquiry stops and malice begins. This is brought out in the attempt by the Supreme Court of Canada to unravel the tension between the proof of the existence of malice and reasonable and probable cause in the law of malicious prosecution in Miazga v Kvello Estate 2009 3 SCR 339 (SCC). The extent to which the guidelines laid down in these recent cases would have resolved the confusion in this field of the law is yet to be realised.
 
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.012 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.005 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.004 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.001 | 0.004 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".