Killer and convicted rapist Sean Price was too dangerous to be kept in a corrections facility for sex offenders so he was released into the community, a court has heard.
Price was known to be at risk of violent sexual offending against women and unwilling to take his anti-psychotic medication when he was allowed to go free in October last year, prosecutors said.
A 2011 psychiatrist's report said the most likely risk scenario was that his mental health would deteriorate and he would stalk and assault women, prosecutor Michele Williams QC told a pre-sentence hearing on Tuesday.
In March this year, Price murdered 17-year-old Masa Vukotic because she was "dressed like a yuppie" and reminded him of Snow White, stabbing her 49 times in a park near her home.
Victorian Supreme Court Justice Lex Lasry on Tuesday asked why Price wasn't returned to the sex offenders correctional facility at Corella Place when his assault sentence expired last year.
Ms Williams said Price, 31, had two separate violent outbursts at Corella Place.
"How could they take him back when he's a danger there? That's ultimately what happened, so he ends up being released," Ms Williams said.
A condition of his release was that he take anti-psychotic medication, which he refused to do, and report weekly to Corrections.
His Corrections officer reported he was paranoid, misogynistic and aggressive when speaking about women, Ms Williams said.
He did not complete his appointment on March 16, when his behaviour was noted to be unusual, hostile and agitated.
He killed Ms Vukotic the following day and then went on a crime spree culminating in the violent rape of a woman in her workplace, motivated by the belief he was "going to jail forever".
Price has pleaded guilty to murder, rape, attempted theft and robbery.
Ms Williams called for him to be jailed for life, never to be released.
He has prior convictions, including sex offences against seven girls and women aged between 13 and 45 in 2002 and 2003.
When questioned by a psychiatrist about these crimes he said it was "more about torture" than sex.
"Didn't know it was sexual, more degrading towards women," he said.
Price, who represented himself from the dock after firing his defence barrister, said the state was responsible for managing him and failed.
He told Justice Lex Lasry he didn't take his medication because "it hurts".
"You dribble and you shuffle. It's torture," he said of his time in the Thomas Embling secure mental health facility.
He said he was deemed incapable of managing his life and others had given an undertaking to manage him.
Ms Williams said medication was important to reduce Price's risk of offending and he had chosen not to take it.
Price was remanded into custody and will be sentenced on a date to be fixed.
