Three conspiracy theorists had shared delusions but did not carry out a terrorist act when they ambushed police in an attack that killed six people, a coroner says.

Almost three years after the Wieambilla shootings shocked the nation, State Coroner Terry Ryan on Friday delivered his findings in Brisbane.

Brothers Nathaniel, 46, and Gareth Train, 47, used high-powered rifles to gun down Constables Matthew Arnold, 26, and Rachel McCrow, 29, at a rural property west of Brisbane on December 12, 2022.

They joined Gareth Train's wife Stacey, 45, to also fatally shoot 58-year-old neighbour Alan Dare.

An inquest last year heard expert evidence that the Trains engaged in terrorism that was religiously motivated by their extreme Christian beliefs.

Mr Ryan said he accepted the psychiatric expe

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