Serious violent offenders should be supervised in the same way serious sex offenders are once their parole period has expired, a Victorian coroner has recommended, after finding a convicted murderer was not adequately monitored before he killed again.

Sarah Cafferkey, 22, was bashed and stabbed by Steven James Hunter at his Bacchus Marsh unit north-west of Melbourne in 2012, after the pair had an argument.

Her body was found in a wheelie bin at a home in Point Cook nine days later.

He is now serving life in prison without parole for killing the 22-year-old.

Hunter was convicted of murdering an 18-year-old schoolgirl in 1986.

The inquest heard Hunter, who was 47 when he killed Ms Cafferkey, had been in and out of prison for more than 20 years and in 2005 he was jailed again for kidnapping and assault offences.

His parole period for those offences ended less than two weeks before he murdered Ms Cafferkey.

A Supreme Court hearing had been told the pair had a friendship based on partying and drug use, and on the night she was killed they had fought after Ms Cafferkey believed Hunter had called her a junkie.

Steven James Hunter is serving life in prison for the murder of Sarah Cafferkey. ( AAP: Julian Smith )

Coroner Ian Gray found the risk assessment tools used in deciding Hunter's suitability for parole at the time were "deficient", noting the methods had since changed.

He found Hunter was able to "play the system" and his case workers "did not bring sufficient rigor or scepticism" when judging his assessment of his progress on parole.

Hunter was "unreformed" when it came to his attitude towards violence, and violence against women, Judge Gray said.

He recommended the Victorian Government introduce a scheme to deal with violent criminals similar to that used for sex offenders, a measure proposed by a review into the management of serious sex offenders which was released in April.

The Harper Review was commissioned after Melbourne schoolgirl Masa Vukotic was killed by Sean Price, a man with a history of violent offending.

It called for the same conditions that are imposed on serious sex offenders, such as curfews and electronic monitoring, to be imposed on violent offenders.

The Victorian Government accepted the recommendations when the report was released.

System errors could have been avoided: mother

Ms Cafferkey's mother Noelle Dickson said the coroner's recommendation to change the way serious offenders were monitored needed to be followed up.

"The Government needs to make sure that recommendation is put into place, and not just agree with the principles," she said.

"There obviously were faults with the system, with Corrections Victoria, the case workers, with their information sharing that wasn't going through to the parole board.

"I think it's important to note that the parole board was only acting on the information that was given to them, and obviously that wasn't enough.

"There was so much there that wasn't followed through."

She said the faults in the system needed to be fixed to keep the community safe.

"It's just heartbreaking to think this could have been avoided," she said.