NSW weapons licensing messed up and ignored history of domestic violence, granted the guy a firerams license, he then bought guns and shot his children.
You can be sure that the highlighted "key failures by government agencies" will have NSW following the way that QLD now treats license applications and renewals with a 'reject first, ask questions later' approach.
"A coroner has found the tragic deaths of two Sydney children, shot by their father, could have been prevented. Despite having a history of domestic violence, John Edwards was able to gain a gun licence before murdering son Jack and daughter Jennifer in their West Pennant Hills home. Today, the coroner highlighted key failures by government agencies. More: https://7news.link/2PHWkXt "
https://www.youtube.com/watch?v=HEGjCEd7Nl8