The Latest Breaking News from Gareth Train

US prosecutors have successfully argued Australian police can give evidence at the trial of a man accused of links to deadly shootings.

A US man who talked to an Australian family before and after they fatally shot two police officers later allegedly told FBI agents he added "fuel to the fire".

The families of two police constables killed in rural Queensland say there was no reason for the officers to attend the call-out that led to a fatal shooting.

A lawyer has told a coroner that three Christian extremists would probably not have fatally shot two police officers and a bystander in an ambush on a rural Australian property and wounded a third officer two years ago if they had not shared the same psychiatric disorder

The families of two young police constables shot dead in a rural ambush want their loved ones' legacy to be changes that protect officers in the line of duty.

The Wieambilla shootings remain an "open terrorism investigation" in Queensland that includes a US man closely associated with the killers, a coroner has heard.

A senior police officer would have sought specialist advice about a family of killers if he had access to information from an interstate force, a coroner heard.

NSW police did not pass on reports about the apocalyptic beliefs of two brothers before six people were shot dead on a rural property, a coroner has heard.

A coroner investigating the shooting deaths of six people in Queensland has heard the killers' deadly threats were forwarded to NSW police hours beforehand.