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.
Covina massacre
The Covina massacre occurred on December 24, 2008, in Covina, a city in the suburbs of Los Angeles, California, United States. Nine people were killed, either by gunshot wounds or in an arson fire inside a house on 1129 East Knollcrest Drive, where a Christmas Eve party was being held. The perpetrator, 45-year-old Bruce Jeffrey Pardo who had entered the house wearing a Santa suit, died from a self-inflicted gunshot to the head at his brother's residence in the early hours of the morning after the attack. Authorities cited marital problems as a possible motive for the violence; reports indicated that Pardo's divorce had been finalized on December 18, one week before the massacre. Three people, including Pardo's ex-wife and his former in-laws, were initially declared missing pending identification of their bodies.