Unsolved Australian criminal cases
A collection of criminal cases in Australia that remain unsolved, typically involving homicides, missing persons, or other serious offences where perpetrators have not been identified or convicted.

Definition
Unsolved Australian criminal cases refer to investigations into serious crimes committed in Australia where law enforcement has been unable to identify, arrest, or successfully prosecute a perpetrator. These cases remain open in police files and can theoretically be solved at any time if new evidence emerges, as there is no statute of limitations for serious crimes like murder in Australian jurisdictions.
Australia maintains cold case units in most state and territory police forces, which periodically review unsolved cases using modern forensic techniques such as DNA analysis, genealogical databases, and digital forensics. Notable categories include the so-called "Bowraville murders" of three Aboriginal children in the early 1990s, the disappearance of the Beaumont children in 1966, and various unidentified serial killings. These cases often attract significant media attention and public interest within Australia's true crime community.
Unlike the United States federal system where cases can sometimes be prosecuted under both state and federal jurisdictions through the dual sovereignty doctrine, Australia's federal structure limits concurrent jurisdiction. The Australian Federal Police primarily handles crimes against Commonwealth law, while state police forces investigate most murders and missing persons cases. However, cross-jurisdictional cooperation occurs through national databases and task forces.
The distinction between "unsolved" and "cold" cases is significant in Australian policing. A cold case is typically one where all investigative leads have been exhausted but the case remains open, while an unsolved case may still have active lines of inquiry. Advances in forensic science have led to the resolution of several high-profile Australian cold cases in recent years, demonstrating that cases can remain viable for decades.
Australian law does not impose time limits on prosecuting serious indictable offences such as murder, meaning suspects can be charged and tried regardless of how much time has elapsed since the crime. This principle applies across all Australian states and territories, allowing for the possibility that even decades-old unsolved cases can eventually result in prosecution if evidence becomes available.
