Mert Ney had been listed as a missing person by his family following a "domestic violence situation", which prompted a police "concern for welfare report", in the days leading up to
Tuesday's fatal stabbing rampage in Sydney's CBD.
Mr Ney, 20, was arrested in dramatic scenes near York St after he allegedly ran through the city covered in blood, brandishing a bloody butcher's knife, stabbing one woman in the back and fatally slashing the throat of another.
"Police had taken a report for a domestic violence situation, so he was on the system [for authorities to] 'keep a look out for him'," said NSW Police Commissioner Mick Fuller on Wednesday.
He confirmed that the 20-year-old had recently "self-admitted himself [to a facility] following a medical issue" prompting subsequent mental health assessments.
Search warrants were conducted Tuesday night at Mr Ney's family home in Maryong and at another property, in Blacktown.
Police say he had left the family home and may have been "couchsurfing or homeless for some time", and recently living at the Blacktown property.
Commissioner Fuller said the joint agency counter terrorism unit had met since 7am on Wednesday to re-examine Tuesday's events, adding that the investigation was ongoing, but that it was still thought not to be a terrorist-related incident.
"I feel as though what he has on social media, what we may well find in his bedroom will... shine more light on why this crime happened," he said.
https://www.smh.com.au/national/nsw...mestic-violence-incident-20190814-p52gvo.html