Two of Queensland's most brutal unsolved murders may have been committed by the same killer

Warning: This story contains graphic details that readers may find distressing. Queensland historian Jack Sim says it remains "at the very top" of Australia's most notorious and "dreadful" murder mysteries. "The reality is that Queensland has had very few murders like that — that match the level of violence," Ms Stevenson says. A full day later, Brisbane Criminal Investigation Branch head Frederic Charles Urquhart and two detectives finally arrived in Gatton — just in time for the slain siblings' funerals. "This was far bigger than what most police at the time had ever dealt with," Mr Sim says.