Despite being ordered to stay away from his children and ex-partner, a Melbourne man moved in with them after being released early from prison.
The father of three had a long history of reported domestic violence with police and other state government services, including child protection.
At one point, his former partner was moved to secure housing to escape from him.
But when he was let out of prison, at the end of 2019, he moved in with her and their three children as he had nowhere else to go.
Less than two months later, he killed the 49-year-old woman at her home in Melbourne's southeast.
Their children had just returned from school to find their parents arguing.
He was jealous and enraged about his ex's new relationship, when he followed her through the family's home holding a knife.
The man reached over their children to inflict a fatal stab wound to the woman's neck, before their son bravely intervened and tackled him to the ground.
She ran outside to her neighbour's home while injured.
They tried to save her but she died at the scene.
Victoria's state coroner John Cain has ordered a multi-agency review into all services that the man, woman and their children came into contact with in the lead-up to her death.
This includes Victoria Police, corrections and child protective services.
"I think this family is looking for some answers," Judge Cain told the Coroners Court on Monday.
He said it did not appear the family were offered sufficient support by the three services, nor were they engaged with services offered to Indigenous Australians.
"It looks as though there were a number of opportunities that were missed."
The court has been given child protection and housing records by the relevant state departments, and Victoria Police has conducted an internal review of its records.
The coroner is considering whether to hold an inquest into the woman's death, after her ex-partner was jailed for up to 25 years for her murder last year.
Members of the woman's family, who were in court, said the three children were struggling and another court process would be difficult for them to participate in.
The case will return to the court in August.
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