
A US man messaged an Australian family urging "absolutely no quarter" for police days before two officers and a neighbour were shot dead, Arizona prosecutors claim.
Brothers Nathaniel, 46, and Gareth Train, 47, used high-powered rifles during an ambush to kill Constables Matthew Arnold, 26, and Rachel McCrow, 29, at a remote property at Wieambilla west of Brisbane, on December 12, 2022.