Missing - Lees was bound and abducted, but managed to escape and hide in shrubbery until it was safe. Murdoch is currently serving life in prison for his crimes. Falconio's body has still not been found.
The Backpacker Murders - Ivan Milat was convicted of killing seven backpackers in NSW's Belanglo State Forrest during the 1980s and 1990s. He received life without parole for brutally stabbing and shooting the victims.
Beaumont Children - On Australia Day in 1966, the young Beaumont children went missing during a day at Glenelg Beach, SA. They took the bus like they had the day before, but this time didn't return home.
Wanda Beach Murders - Best friends, Marianne Schmidt and Christine Sharrock, were found murdered at Wanda Beach near Cronulla in 1965. Although this case remains cold, there may be ties to the Beaumont Children.
Mass shooting - It was one of the deadliest mass shootings Australia has seen, leading to major change in national gun control laws. Bryant confessed to all murders, and is serving 35 life sentences without parole.
Ordeal - Dean lit one bed on fire that was 1m away from a patient, and while firefighters were attending to that one, lit another fire and closed the doors. The horrific ordeal led to the death of 14 elderly patients burning alive.
Family Court of Australia attacks - Between 1980 and 1985, a series of bombings and shootings occurred at the Family Court of Australia, killing four people in total. A bomb was also found attached to car parked out the front of the building.
Hoddle Street Massacre - In 1987, there was a mass shooting on Hoddle Street in Clifton Hill. Seven people were shot dead, and 19 people were seriously injured, by Julian Knight, an ex-army cadet aged 19.
Graeme Thorne - The abduction of Graeme Thorne in 1960 was Australia's first kidnapping for ransom. The kidnapper demanded the parents' Opera House lottery winnings, but ended up murdering the boy in the process. The murderer was an immigrant named Stephen Bradley, and was served a life sentence.
Cannibal Murderess - Katherine Knight had a history of inflicting domestic violence, then she went too far. Having worked at an abattoir she had experience with knives. In 2001 she killed her partner, John Price, and skinned him.