The Melbourne man who fatally stabbed Doncaster teenager Masa Vukotic has fired his defence team, saying he wants to apologise, rather than make excuses.

In August, 31-year-old Sean Price pleaded guilty to the murder of the 17-year-old high school student.

After more than two hours of listening to his defence team outline his difficult childhood, violent sexual history and recent mental state, Price suddenly dismissed them.

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“I want to apologise for my crime,” Price told Justice Lex Lasry.

“I don’t wish to make any excuses for my actions … I simply wish to take the full consequences.”

The court previously heard that Price told police earlier this year that he had been planning to stab someone days before the attack.

“I was planning this for days before,” he was said to have told police after he repeatedly stabbed Ms Vukotic as she walked in a park near her home.

A plea hearing in the Supreme Court has heard he told police after the murder that he “hated society” and it was “just building up”.

“I’m hating, hating,” he said.

Prosecutor Michele Williams told the court that Price admitted to police he had gone to Kew on one occasion with the intention to find someone to stab, but did not follow through.

The court heard that on March 17 Price had spent the day on buses and trains, and returned to his Albion home at one point to get a large kitchen knife and a spare T-shirt.

He continued to ride public transport and eventually arrived at a Park and Ride station in Doncaster about 6:30pm.

“This chick was on the other side of the road,” Price is said to have told police of Ms Vukotic.

“I was looking, looking and I saw her … and I thought this is the moment.

“I just f***ing had to kill her, man.”

She received a total of 49 stab wounds to her neck, chest and other parts of her body.

“I made sure she was f***ing dead otherwise it was a waste of f***ing time,” Price told police.

Ms Williams told the court that in February of this year Price had borrowed library books about crime scene and forensic investigation, as well as a book about the notorious backpacker killer Ivan Milat.

The court heard Price has a history of violence, serving five and half years for a series of assaults and rapes in 2003.

The hearing continues.

-ABC