Alibis (SA)

By James Stevens, Director and Solicitor, Go To Court Lawyers. Last reviewed 14 April 2026.

When someone is charged with an offence in South Australia, they may contest the charge by relying on either a legal or a factual defence. Examples of legal defences are self-defence, duress and automatism. A common factual defence is an alibi. An alibi exists where an accused person was not at the scene of the crime when the alleged offence occurred. This defence strategy can be crucial in criminal proceedings and requires careful consideration of evidence, timing, and procedural requirements under South Australian law.

What are alibis?

Definition and Elements

An accused has an alibi if they were in a particular location or area when the offence was allegedly committed and there could not have committed the offence, or are unlikely to have committed the offence. The effectiveness of an alibi defence depends on establishing that the defendant's presence elsewhere makes it impossible or highly improbable that they could have committed the crime in question.

Types of Alibi Evidence

Alibi evidence can take various forms, including witness testimony from family members, friends, colleagues, or strangers who can confirm the defendant's whereabouts. Documentary evidence such as receipts, CCTV footage, phone records, GPS data, or digital footprints may also support an alibi claim. The strength of an alibi often depends on the reliability and independence of the evidence presented.

Burden of proof

Prosecution's Responsibility

The accused does not bear the burden of proving that they were not present at the scene of the crime. The prosecution must prove that the accused person was at the scene of the crime beyond a reasonable doubt. In other words, the prosecution must negate the alibi by demonstrating that despite the alibi evidence, the accused was present and committed the offence.

Standard of Evidence

While the defence does not need to prove their alibi conclusively, they must present sufficient evidence to raise a reasonable doubt about the prosecution's case. The court will assess whether the alibi evidence, when considered alongside all other evidence, creates reasonable doubt about the accused's guilt.

Notice of an alibi

Legal Requirements

If a person is charged with an offence on indictment and is facing trial in the Supreme Court or in the District Court and intends to rely on an alibi, they must give notice of the particulars of their alibi to the prosecution (Criminal Procedure Act 1921, section 124). This statutory requirement ensures procedural fairness and allows the prosecution adequate time to investigate and respond to alibi claims.

Timing and Content

This notice must be given to the prosecution and filed in court at the same time as the defence case statement. The notice should include specific details about where the accused claims to have been, the times involved, and the names and addresses of any witnesses who can support the alibi. However, notice of an alibi does not have to be given if the evidence supporting the alibi was already heard at the committal proceeding.

Failure to give notice of an alibi

Court's Discretion

If the defence in an indictable matter raises an alibi without having given notice of an alibi to the prosecution, the court may disallow the evidence, or it may require the matter to be adjourned so that the prosecution can investigate the alibi. The court's decision will depend on factors such as the prejudice to the prosecution, the reason for the failure to give notice, and the interests of justice.

Witness Evidence Consequences

If the defence calls a person to give evidence in support of their alibi and the person's details have not been provided to the prosecution, the evidence may be disallowed. In this situation, the court will consider whether the accused was aware of the person's details and whether they took steps to ascertain the person's details and provide them to the prosecution. The court may also consider granting an adjournment to allow the prosecution to investigate the witness.

Alibis in the Magistrates Court

Informal Requirements

There is no formal requirement for the defence to provide notice of an alibi in the Magistrates Court or Youth Court. However, the defence is generally expected to do so anyway as a matter of professional courtesy and good practice. This informal notice helps ensure smooth court proceedings and maintains professional standards.

Practical Considerations

Even without formal requirements, providing advance notice of an alibi defence in summary matters can prevent adjournments and ensure that all parties are adequately prepared for trial. Courts may still exercise discretion regarding the admission of alibi evidence if it causes unfair surprise to the prosecution.

Importance of dates

Precision Requirements

When an accused relies on an alibi, the defendant and the witnesses they call in their defence must be absolutely certain of the date and time when events occurred. Disproving an alibi also requires the prosecution to be able to establish that the offence was committed at the precise date and time specified in the charge. Any uncertainty or inconsistency in timing can significantly undermine the effectiveness of an alibi defence.

Prosecution's Burden

While in some criminal cases, an accused person may be found guilty of an offence even if the date stated on the charge is different to the date that witnesses say the offence occurred because both parties agree about the surrounding circumstances, in a case where an alibi is being advanced, the prosecution must prove beyond a reasonable doubt that the offence was committed at the exact date and time specified on the indictment. This is a matter of fairness to the accused and ensures that alibi defences are not undermined by vague or flexible timeframes.

Building a Strong Alibi Defence

Evidence Collection

Building an effective alibi defence requires thorough preparation and evidence gathering. This includes collecting documentary evidence such as receipts, photographs, electronic records, and obtaining statements from witnesses who can verify the accused's whereabouts. The more corroborative evidence available, the stronger the alibi defence becomes.

Witness Reliability

The credibility and reliability of alibi witnesses are crucial factors in the success of this defence strategy. Courts will carefully examine the relationship between witnesses and the accused, their ability to accurately recall events, and any potential motivations to provide false testimony. Independent witnesses often carry more weight than family members or close friends.

Common Challenges and Pitfalls

Memory and Timing Issues

One of the most significant challenges in alibi defences is establishing precise timing and ensuring consistent witness testimony. Human memory can be unreliable, particularly regarding specific times and dates. Contradictions between witness accounts or uncertainties about timing can severely damage an alibi defence.

Fabricated Evidence

Courts are vigilant about detecting fabricated alibi evidence, which can result in additional charges for attempting to pervert the course of justice. Any evidence that appears contrived or witnesses whose testimony seems rehearsed will be scrutinized closely. The consequences of presenting false alibi evidence extend beyond the original charges and can result in significant penalties.