UPDATE: The brother of slain senior Sydney policeman Detective Inspector Bryson Anderson has spoken publicly about the legacy the well-respected officer and family man left behind.
Damian Anderson told reporters on Friday that his family's sense of loss was tempered with the pride they had in a man who had given his life in the service of the people of NSW.
Insp Anderson was attacked with a knife at a property near Windsor in Sydney's west late Thursday.
He was taken to hospital where he later died.
Damian said his brother was a "dedicated, loving and husband father, son, bother uncle and friend" and thanked the police force and community for their "unwavering support".
"Bryson will never be replaced; however he has left a legacy that will endure," Damian said.
"His passing is not only a loss to his family and friends but also a loss to the people of New South Wales that will never be overcome."
EARLIER: A mother and son have been charged with the murder of widely-respected senior police officer, Detective Inspector Bryson Anderson.
A number of officers were called to a property at Oakville in Sydney's north-west about 2pm on Thursday to deal with a neighbourly dispute, which New South Wales Police Commissioner Andrew Scipione said had been "brewing for ... some period".
Back-up was called for as the dispute escalated, with Insp Anderson arriving on the scene about 4pm.
Police allege he was struck in the neck with a knife not long after and died a short time later.
Another officer was also assaulted during the dispute, Mr Scipione said.
Fiona Barbieri, 42, and her son Mitch, 19, fronted Penrith Local Court on Friday morning charged with the murder.
The pair was not present for the brief mention.
They had bail refused and the matter was adjourned until February 1.
News Limited is reporting the violence was sparked by a feud over a bird aviary.
"This has been an ongoing neighbourhood dispute between two families that's been brewing now for some period," Mr Scipione said.
"It came to an end yesterday and as we know it led to the death of this officer."
Insp Anderson served the force with distinction for 25 years, having after followed his father and brother into policing.
Mr Scipione paid tribute to Insp Anderson, who leaves behind a wife and three children.
He said the tragedy would not only be mourned by Insp Anderson's family, friends and colleagues, but by an entire state.
"Our thoughts and our hearts still bleed for the Anderson family," he said.
"As an organisation we are in mourning. I am sure as a state we are in mourning too for the loss of a fine officer.
"He was a mentor to many and probably a better friend to even more," he said.
"This is the sort of man no one can afford to lose from a modern police agency. His loss is one that we will feel for many, many years to come."
Mr Scipione met with Insp Anderson's family on Thursday night.
He also spoke with Insp Anderson's colleagues, who were "bearing up quite well".
"But let me assure you not too deep under that veneer there was a whole lot of pain going on," he said.
"We were all in mourning last night and we're still in shock today.
"The reality is our police knowingly face dangers every day.
"They go to work each morning not knowing whether they're going to come home that night and yesterday out worst nightmare was delivered to us."
Mr Scipione and NSW Police Minister Mike Gallacher were both scheduled to attend a luncheon with police widows on Friday.
Mr Gallacher said 2012 was supposed to be a year of celebration to mark 150 years of policing.
"We started the year with the death of Senior Constable Dave Rixon. We now conclude 2012 with the death of another officer," Mr Gallacher said.
"It is indeed a very sad year."
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