Coniston massacre
The Coniston massacre, which took place near the Coniston cattle station in the then Territory of Central Australia (now the Northern Territory) from 14 August to 18 October 1928, was the last known officially sanctioned massacre of Indigenous Australians and one of the last events of the Australian Frontier Wars. People of the Warlpiri, Anmatyerre, and Kaytetye groups were killed. The massacre occurred in revenge for the death of dingo hunter Frederick Brooks, killed by Aboriginal people in August 1928 at a place now known as "Yukurru", also known as Brooks Soak.
Moyasta
On 13 March 1921 a Moyasta farmer and Sinn Féin magistrate named Tom Shannon was murdered in his home by unknown assailants. According to the Irish Times on 7 April 1921, which based its article on a report from British government, the killing was done by other Sinn Féin supporters. The government report claimed that Shannon, a magistrate in the Sinn Féin courts, was trying to distance himself from the courts and had refused to pay local Sinn Féin taxes.
In fact, it was clear that the assailants spoke with a strange accent, something the English Court Of Inquiry was not told by the Royal Irish Constabulary. Due to the lack of information, the Court could only conclude that the murder was committed by "persons unknown". This gave the government the opportunity to use the event for some anti-Irish propaganda.
According to more recent research, the murder of Tom Shannon was part of a "secret murder campaign". This campaign was directed at prominent people, often elected representatives and magistrates. As a magistrate, Shannon fell victim of this campaign.