The family of murdered ABC staffer Jill Meagher will face her killer for a final time today when he is sentenced in the Victorian Supreme Court.

Adrian Ernest Bayley, 41, has pleaded guilty to the rape and murder of the 29-year-old Melbourne woman in September last year.

The case has been described by politicians, law experts and police as a "catastrophic" failure of the justice system.

Ms Meagher's husband Tom, her parents George and Edith McKeon, and her brother Michael McKeon will attend today's sentencing by Justice Geoffrey Nettle, which will take place at 9:30am.

The family is expected to make a brief statement later this morning.

In a pre-sentencing hearing last week, the prosecution revealed Bayley's long history of violent attacks on women, spanning more than 20 years.

Key points: Adrian Bayley has pleaded guilty to killing Jill Meagher last year.

Adrian Bayley has pleaded guilty to killing Jill Meagher last year. He will be sentenced today in the Victorian Supreme Court.

He will be sentenced today in the Victorian Supreme Court. The prosecution has called for him to be jailed for life.

The prosecution has called for him to be jailed for life. The defence says he should be given a non-parole term so he has hope of release.

The defence says he should be given a non-parole term so he has hope of release. In a pre-sentencing hearing last week, Bayley's violent past was revealed.

In a pre-sentencing hearing last week, Bayley's violent past was revealed. He has served a total of 11 years in prison for the rape and attempted rape of eight women

He has served a total of 11 years in prison for the rape and attempted rape of eight women Bayley was on parole when he raped and murdered Ms Meagher in 2012.

Bayley was on parole when he raped and murdered Ms Meagher in 2012. The case has highlighted failings by the Victorian Parole Board.

It also revealed he has previously bluffed his way through prison rehabilitation courses.

Bayley was also on parole when he snatched Ms Meagher off Sydney Road in Brunswick as she tried to make a five-minute walk home after a night out with friends.

The fact his parole was not revoked after Bayley admitted to bashing a man unconscious, leaving him free to walk the streets of Melbourne, has highlighted failings by the Victorian Parole Board to monitor sex offenders on parole.

Chief prosecutor Gavin Silbert SC described Bayley as a calculating and manipulative sexual predator and called for him to be to be jailed for the rest of his natural life.

The court heard Ms Meagher was killed because she fought back and threatened to call the police.

It was submitted that Bayley, fearing he would face a lengthy time in jail, then carried out his first murder and went to great lengths to cover up his crime.

Defence lawyer Saul Holt SC said Bayley accepted he should be given a life sentence for the murder of Ms Meagher.

However, Mr Holt said Bayley's guilty plea shows his remorse and his client should be given a non-parole term, to give him some hope of release in the future.

Bayley told police 'they should never have let me out'

During a 10-hour police interview, Bayley gave a candid assessment of the high risk he posed to women after admitting he strangled Ms Meagher and then dumped her body in Gisborne South, 50 kilometres north of Victoria.

"I'm going to jail for a long time... I hope they bring back the death penalty before I get sentenced. I have no life left," Bayley told detectives.

"They should have the death penalty for people like me.

"How many chances does a person need? They should never have let me out."

Earlier this year, the Victorian Government admitted existing parole laws had failed and tougher measures were needed.

The Government is introducing legislation to ensure people who reoffend while on parole will automatically have their parole cancelled or reassessed.

There will be a mandatory cancellation of parole for sex and violent offenders who are convicted of the same type of offence while on release.

A review of Victoria's parole board by former Justice Ian Callinan is due to be handed down in a few weeks.