He said the investigation would also focus on what other jobs police were attending at the time.
“That’s why I’ve asked for it to be independently reviewed because we want to see what happened from the time that call was made, how the radio operator dispatched that call, the circumstances around that, the timings until it was acknowledged and until police attended,” he said.
The investigation will involve the police’s professional standards command, as well as the Law Enforcement Conduct Commission.
Detectives from Richmond Police District and the homicide squad will lead the murder investigation.
The woman was yet to be formally identified on Saturday afternoon. Police believe she had been in a relationship with the accused for several months.
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It’s the second domestic violence-related death in the state in two days after a woman was allegedly murdered by her housemate at Russell Lea in Sydney’s inner west on Thursday.
Asked if domestic violence was “getting out of control” in NSW, McKenna said the issue was at the top of police’s priority list.
“We take domestic violence extremely seriously, we’ve only just had a significant forum, the new coercive control laws come out on Monday, it is something we prioritise every single day and is one of the main parts of our job is keeping communities safe, victims safe,” he said.
“We’re striving every day to make a difference. We can’t do it alone, but we’re out there to support the community.”
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