The man who murdered Melbourne schoolgirl Masa Vukotic in a thrill kill was subdued in prison by tear gas and the riot squad during a birthday temper tantrum.
Sean Price is potentially facing disciplinary action after he allegedly used a makeshift blade in a confrontation with guards at Victoria's Metropolitan Remand Centre, the Herald Sun reports.
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Already deemed one of the most high-risk prisoners in the system, Price reportedly refused to come out of his cell on his 32nd birthday on February 2, using a shield and shiv and damaging equipment.
He was eventually pacified when emergency group services fired tear gas at him.
"Officers used tear gas to help them extract the prisoner safely," a corrections spokesperson told the newspaper.
Price is currently awaiting sentence for murdering Masa Vukotic in March last year.
He pleaded guilty to stabbing the 17-year-old 47 times in a random and vicious attack as she ran through a park near her Doncaster home.
He will be sentenced in the Supreme Court where Justice Lex Lasry will also sentence him for rape, theft and attempting to steal a motorbike in a two-day crime spree in Melbourne's west.