A violent career criminal who killed two people while on parole and threatened witnesses during his trial could be back in Victoria next month after authorities indicated he will be granted parole again.

The decision comes despite a NSW Supreme Court justice labelling Warren Alan Forbes, now 42, a "recidivist offender" with almost no chance of rehabilitation when sentencing him to prison on two counts of manslaughter in 2004.

Warren Forbes is escorted from court in 2014. Credit:The Border Mail

The families of Forbes' victims are outraged by the parole authority's move, claiming the formal review hearing set for late March is now little more than a rubber stamp.

The Sunday Age understands that witnesses who testified at his trial fear for their safety after some of Forbes' criminal associates have allegedly been threatening reprisals ahead of his parole application.