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Accused Sydney Stabbing Attacker To Defend Charges 'On The Grounds Of Mental Illness'

Mert Ney intends to defend charges including murder for killing a sex worker and stabbing a woman during an alleged knife rampage in the CBD.

The man accused of murdering a sex worker in a Sydney unit before stabbing another woman in the CBD will defend the charges on the grounds of his mental health.

Mert Ney, 20, was on Friday night charged with murder, attempted murder, wounding with intent to cause grievous bodily harm, intentionally choking with recklessness and common assault.

Police allege he killed Michaela Dunn, 24, in a Clarence Street apartment on Tuesday before allegedly stabbing Linda Bo, 41, in the shoulder at the Hotel CBD.

Michaela Dunn
Photo: Supplied.

The 20-year-old was later filmed allegedly running through the city streets brandishing a bloodied kitchen knife before being restrained by onlookers and arrested.

Ney appeared before Parramatta Bail Court on Saturday, bail was not applied for and was formally refused.

Outside court Ney’s lawyer Zemarai Khatiz revealed his client intended to defend the charges.

“He’s going through a very difficult situation at this time,” he told reporters.

READ MORE: Woman Killed In Sydney Stabbing Identified As Michaela Dunn

READ MORE: 'I Hate My Last Name': Mert Ney's Family Slams His 'Despicable' Actions

“But in relation to the allegations he will be defending the charges on the grounds of mental illness.”

Investigators have been trying to piece together why Ney, who had a history of mental illness, launched the alleged attack.

Ney was allegedly carrying a USB stick with information about recent mass casualties in New Zealand and the United States and could be heard on video footage shouting "Allahu akbar".

NSW Police have not classed the attack as a terrorist incident and have not identified any links to terrorist organisations.

If you need help in a crisis, call Lifeline on 13 11 14. For further information about depression contact Beyond Blue on 1300 22 4636 or talk to your GP, local health professional or someone you trust.