Being charged with driving under the influence of alcohol does not always mean a conviction will follow. In South Africa, drink driving is prosecuted under section 65 of the National Road Traffic Act 93 of 1996, and the State must prove its case beyond reasonable doubt. If the evidence is weak, the procedure was flawed, or a constitutional right was breached, the National Prosecuting Authority may withdraw the matter before trial, or the court may acquit at the close of the State’s case.
A withdrawal is not automatic and is never guaranteed. Each matter turns on its own facts, the docket, and the quality of the evidence. What this article sets out is the legal groundwork that defence counsel rely on when arguing that a section 65 case should not continue.
Understanding these grounds helps you give your attorney proper instructions early, when defects in the State’s case are easiest to identify and act on.
Insufficient Evidence to Prove the Offence
The starting point is that the State must prove every element of the offence beyond reasonable doubt. For a section 65 charge, that includes the identity of the driver, the fact that the accused drove on a public road, and that the blood-alcohol concentration exceeded the prescribed limit. If any element is missing or unsupported by admissible evidence, the prosecutor may conclude there is no reasonable prospect of a conviction and withdraw the charge in terms of the NPA Prosecution Policy.
Common gaps include no properly recorded observation by the arresting officer, missing or contradictory witness statements, or a docket that simply does not place the accused behind the wheel. Where the State’s evidence is thin on its face, defence representations to the prosecutor can lead to a withdrawal before plea.
A Break in the Chain of Evidence
Evidence in drink driving cases almost always depends on physical evidence, either a breath sample or a blood sample. That evidence must move through a documented chain of custody, from the officer at the scene, to the forensic laboratory, to the courtroom. Each handover must be accounted for.
- Gaps in the SAPS 52 form or the J534 documentation can break the chain.
- Unexplained delays between the drawing of the blood sample and its delivery to the laboratory raise doubt about the reading.
- Missing or incomplete laboratory receipt records can undermine the evidentiary value of the analysis.
- Where the sample cannot be tied to the accused with certainty, the State’s case may collapse.
A break in the chain does not automatically invalidate the result, but it gives the defence a basis to argue that the court cannot safely rely on the reading. Faced with that argument, the NPA may withdraw rather than risk an acquittal.
Unlawful Arrest or Irregular Procedure
The Constitution and the Criminal Procedure Act 51 of 1977 govern how an arrest and search must be conducted. If the arresting officer lacked the jurisdictional grounds to arrest, failed to inform the accused of their rights, or took the breath or blood sample outside the procedural framework, the defence can bring a section 35 challenge or argue that the evidence should be excluded.
Procedural irregularities that have supported challenges to drink driving matters include arrests without prior observation or reasonable suspicion, the absence of a traffic officer where one was required, and the failure to take the accused to an authorised person for the drawing of blood within the two-hour window where applicable.
Faulty Breathalyser Calibration and Maintenance
Breath-alcohol evidence depends on the instrument being accurate at the time of the test. The evidentiary breath testing instruments used in South Africa must be operated by a certified operator and must carry a current calibration certificate. Where the certificate has lapsed, where the instrument was not serviced according to schedule, or where the operator was not properly qualified, the reading can be challenged.
- Calibration certificate expired or not before the court on the day of trial.
- Service and maintenance logs that show gaps or overdue intervals.
- Operator training records that are incomplete or cannot be produced.
- Failure to follow the manufacturer’s pre-test procedure, including the observation period.
In several reported matters, South African courts have excluded breath evidence where the State could not produce the calibration record. Without that record, the reading is hearsay, and the State’s case often cannot proceed.
Missing Analysts and Forensic Reports
Where the State relies on a blood-alcohol analysis, the analyst who signed the report must ordinarily be called to give oral evidence. The same applies to the arresting officer and any medical practitioner who drew the sample. If essential witnesses are unavailable, have left the employ of the State, or cannot be traced, the prosecutor may be unable to place the evidence before the court.
Forensic laboratory backlogs at the SAPS forensic science laboratory are a recognised cause of delay, and where the delay becomes unreasonable it can intersect with the accused’s right to a fair trial. A docket that is repeatedly postponed for the same missing report is a candidate for a withdrawal or a discharge.
The Right to a Speedy Trial
Section 35(3)(d) of the Constitution guarantees the right of an accused to a trial without unreasonable delay. This does not mean a single postponement will collapse the case, but cumulative delay, particularly delay caused by the State, can ground an application for a permanent stay of prosecution. The leading South African judgments on speedy-trial challenges set out a balancing exercise that weighs the length of the delay, the reasons for it, any prejudice to the accused, and the seriousness of the charge.
Faced with a strong stay-of-prosecution application, the NPA may withdraw rather than run the risk of an adverse ruling that sets precedent.
A Successful Objection at the Close of the State’s Case
If the matter proceeds to trial and the State closes its case, the defence may bring an application for discharge in terms of section 174 of the Criminal Procedure Act. The test is whether, at the close of the State’s case, there is evidence on which a reasonable court could convict. If the answer is no, the accused is entitled to be discharged.
This is not the same as a withdrawal before trial, but it produces the same practical outcome for the accused: the charge ends without a conviction. A well-prepared section 174 application, identifying the specific gaps in the State’s evidence, is one of the most effective ways to end a drink driving case.
Honest Limits on These Grounds
None of the grounds above is a technicality that the court will apply on its own. Each has to be identified, pleaded, and properly placed before the court or the prosecutor. Many drink driving matters proceed to conviction despite a defence argument, because the State cured the defect, called the missing witness, or produced the calibration certificate on the day.
An honest assessment early in the matter is essential. Some cases have genuine prospects of withdrawal or discharge; others do not, and the right advice may be to negotiate a plea on a lesser allegation or to mitigate sentence. Early, frank advice protects you from running a hopeless defence at unnecessary cost.
How Otrebski Attorneys Approaches These Matters
Otrebski Attorneys is a 100% women-led firm with a single office in Sandton and a dedicated Criminal Law department. We are a Level 4 B-BBEE contributor and carry a five-star rating across twelve reviews. Our Director, Nastasja Otrebski, personally oversees the criminal defence caseload.
In a drink driving matter we secure full disclosure of the docket, examine the chain of custody, scrutinise the breathalyser calibration and operator records, and assess the availability of the State’s witnesses. Only then do we advise on prospects of withdrawal, discharge, or plea. The aim is an honest, evidence-based view, not a promise of an outcome.
Frequently Asked Questions
What are the legal reasons a drink driving case may be dropped in South Africa?
The main reasons are insufficient evidence to prove every element of the section 65 National Road Traffic Act offence, a break in the chain of custody of the breath or blood sample, an unlawful arrest or irregular procedure, faulty breathalyser calibration or operator records, missing analysts or forensic reports, unreasonable delay engaging the right to a speedy trial, and a successful section 174 discharge at the close of the State’s case.
Can a drink driving charge be withdrawn before trial?
Yes. The National Prosecuting Authority may withdraw a charge before plea where representations show there is no reasonable prospect of a conviction or where prosecution is not in the public interest. Withdrawal is at the prosecutor’s discretion and is never guaranteed; it depends on the specific defects in the docket.
Does an expired breathalyser calibration certificate automatically invalidate the case?
No ground is automatic. An expired or missing calibration certificate is a strong basis on which to challenge the admissibility of the breath reading, and courts have excluded such evidence, but the State may be given an opportunity to cure the defect by producing the certificate at trial.
What is a section 174 discharge in a drink driving trial?
Section 174 of the Criminal Procedure Act 51 of 1977 allows the court to discharge the accused at the close of the State’s case if there is no evidence on which a reasonable court could convict. It is one of the most common ways a drink driving trial ends in acquittal without the defence having to lead evidence.
Is withdrawal of a drink driving case guaranteed if there was a procedural error?
No. Minor procedural errors are often cured by the State. Withdrawal or acquittal usually requires a defect that goes to the root of the State’s case, such as a fatal break in the chain of custody, an unlawful arrest, or the absence of an essential witness whose evidence cannot be led.
Get help with a criminal law matter. If you have been arrested for, or summonsed to court on, a drink driving charge, the Criminal Law team at Otrebski Attorneys in Sandton can assess the docket, identify any defects in the State’s case, and advise honestly on the prospects of withdrawal, discharge, or plea. Our women-led practice, under Director Nastasja Otrebski, deals with criminal defence matters daily.
Disclaimer. This article is general information about the criminal justice process for drink driving in South Africa, not legal advice for a specific matter. Whether a charge may be withdrawn or an accused discharged depends on the facts of the docket, the evidence led, and current prosecutorial and judicial practice. For advice on your own arrest or summons, consult a qualified attorney.