What is the presumption of innocence?

The presumption of innocence is the legal principle that a person accused of a crime is considered innocent until proven guilty by a court beyond reasonable doubt. It is a fundamental protection of individual liberty in the Australian criminal justice system and is reflected across federal and state criminal law, evidence rules, and bail and remand practices.

In practice, the presumption shapes the criminal process at every stage. The prosecution carries the burden of proving every element of the alleged offence; the accused does not have to prove their innocence. The standard of proof is beyond reasonable doubt, the highest standard in any legal proceeding. The accused has the right to silence and cannot be compelled to testify. Juries (in trials by jury) must be directed to consider only the evidence presented in court and to acquit if they have any reasonable doubt about guilt.

Australia is a signatory to the International Covenant on Civil and Political Rights, which expressly recognises the presumption of innocence in article 14. The principle is also embedded in the Evidence Act 1995 (Cth) and equivalent state legislation, in the model Criminal Code, and in the rules of court for every Australian court that hears criminal matters. Prosecutorial guidelines from the Office of the Director of Public Prosecutions also reflect the principle, requiring prosecutors to act in the interests of justice and not merely to secure a conviction.

Several modern issues test the principle. Reverse-onus offences (where the accused must establish a defence rather than the prosecution disprove it) appear in some regulatory areas such as drug possession with intent to supply and certain corporate offences, and have been the subject of constitutional challenge. Pre-trial detention raises concerns when accused people are held in custody for extended periods before trial. Public commentary and media coverage of high-profile cases can also undermine the presumption in practice, even though courts carefully manage jury exposure to such material through suppression orders and directions to disregard external information.