NSW Police Commissioner Andrew Scipione has paid tribute to a senior detective killed in the line of duty yesterday.
A mother and her son have been charged with murder over the stabbing death of a policeman in Sydney's northwest.
Detective Inspector Bryson Anderson, 45, was killed after responding to a domestic dispute at a rural property in Scheyville Rd, Oakville, about 2pm yesterday.
There were incorrect reports yesterday about how Mr Anderson was killed.
Police Commissioner Andrew Scipione said Det Insp Anderson died following a knife attack, contrary to reports that he was killed with an axe or a bow and arrow.
"We will be alleging that a knife was used in this attack," Commissioner Scipione told reporters in Sydney.
"A knife was used and led to the death."
Mr Scipione said a 19-year-old man and his 45-year-old mother were arrested at the scene and subsequently charged with Det Insp Anderson's murder.
Police were on the scene after responding to reports of an altercation between two neighbouring families, which had "been brewing now for some period", Mr Scipione says.
As the matter is yet to go before court, police would not be releasing any information that could compromise prosecution of the accused, Mr Scipione said.
The mother and son would appear in Penrith Local Court later today, where more details of the incident would become available, the commissioner said.
Mr Scipione said it was "an honour and a privilege" to celebrate, even in this saddest of times, the life of Det Insp Anderson.
"His commitment, his dedication, his ongoing experience will be sadly lost and missed," Mr Scipione said.
"He was a mentor to many and probably a better friend to even more.
"This is the sort of man that no one can afford to lose from a modern police agency."
One of the accused also assaulted another officer with a weapon, Mr Scipione said.
Mr Scipione praised the efforts of paramedics and police who tried to save Det Insp Anderson's life before he was declared dead at Hawkesbury Hospital.
"I am sure (they did) all that was humanly possible to save his life," he said.
A post mortem examination will be conducted today, and police will issue further details surrounding Det Insp Anderson's death afterwards, Mr Scipione said.