The Sydney Shark Arm Murders

On April 25, 1935, a captive tiger shark on display at Sydney's Coogee Aquarium regurgitated a tattooed human arm, which was identified as belonging to James Smith, a former boxer with underworld connections missing since mid-April. Patrick Brady was charged with Smith's murder, but a key witness — Reginald Holmes — was himself shot dead the night before he was to testify. Brady was ultimately acquitted as the single arm alone was ruled insufficient evidence of murder under Australian law. The case was never solved and remains one of Australia's most bizarre and enduring criminal mysteries.