The Victorian Government appears to have backed away from implementing the toughest recommendation from a parole board review.

Retired High Court judge Ian Callinan was commissioned by the State Government to review the parole system in the wake of more than a dozen murders by parolees, including the 2012 rape and murder of Brunswick woman Jill Meagher.

The Callinan review was damning, and found that several violent criminals had been released into the community in Victoria without proper consideration of public safety.

However, one of Mr Callinan's recommendations - that the law be changed so only violent offenders who pose a "negligible risk" be granted parole - has not been implemented in full.

Corrections Minister Edward O'Donohue said all of the Callinan report recommendations had been acted on, but he repeatedly refused to be drawn specifically on "Measure 6".

"The thrust of Mr Callinan's recommendation in Measure 6 and the entire report is to better address risk and reduce risk as much," he said.

Under parole board reform: Serious violent offenders and sex offenders will be dealt with differently and complete treatment before being considered for parole.

Serious violent offenders and sex offenders will be dealt with differently and complete treatment before being considered for parole. Serious violent offenders and sex offenders will face a two-tier process to gain parole.

Serious violent offenders and sex offenders will face a two-tier process to gain parole. Parole breaches made a criminal offence and all offenders who reoffend while on parole must serve at least half their remaining before being reconsidered.

"The Government is doing that through an end-to-end risk management process."

He said prisoners would be held to a higher risk threshold before being granted parole.

Measure 6 was popular with victims-of-crime groups, but has drawn criticism from law factions who believed it was a flawed policy.

The mother of murdered 22-year-old Sarah Cafferkey, Noelle Dickson, says she met with the Corrections Minister in March and was led to believe the Callinan review had been followed to the letter.

"I am really disappointed because they have let the community down again," she said.

Reform controversy causes parole board 'clean out'

Since the Callinan report was released the parole board has experienced what has been termed by one insider as a "clean out".

Many board members resigned and others were caught up in the decision to limit sitting terms to nine years.

The board's numbers have been boosted from 23 to 31, but only eight from last year remain.

The ABC has been told many members resigned believing the high bar of "negligible" risk was unachievable and would lead to violent offenders being released into the community without the supervision parole provides.

"You don't work in the parole system if you don't believe in parole," a former board member said.

Many others believed they had been made the scapegoat by the government after years of under-resourcing and under-staffing.

Mr O'Donohue said training would be provided for new members.

Corrections Victoria is rolling out an $84 million package, including prison treatment programs, new risk assessment tools, and new case managers to supervise parolees after release.