Sydney Stabbing Accused To Defend Charges On Mental Illness Grounds

Lawyers for 20-year-old Mert Ney say he will plead not guilty to a string of charges including murder, laid after Tuesday's stabbing rampage in Sydney's CBD.

Dressed in prison greens, Ney sat quietly as his case was heard for the first time in Parramatta Local Court this morning.

His lawyer, Zemarai Khatiz, asked the Magistrate for a formal order so Ney could see a doctor "as a matter of urgency".

"He hasn't been given his pain medication he's asked for it over six times now so that is why we asked the court to make an order or a recommendation for him to have his medication," he said.

The Magistrate granted the request but noted that Ney had been in hospital until yesterday afternoon, after undergoing surgery for a cut to his leg.

Five charges have been laid against Ney including over the murder of 24-year-old Michaela Dunn in her CBD apartment, and the attempted murder of 41-year-old Linda Bo who was stabbed in the back as she walked towards Darling Harbour.

Ney was also charged with intentional choking, and assault against his sister, on the Wednesday before the attack.

But his lawyer says he will plead not guilty to all charges on the grounds of his mental health.

"He's going through a very difficult situation at this time but in relation to the allegations he will be defending the charges on the grounds of mental illness."

Khatiz was questioned as to what mental illness Ney is suffering, but only replied: "he's got a long history of mental health problems. There's a combination of things."

Ney will reappear via video link in Central Local Court on Monday.