Victoria's Director of Public Prosecutions is appealing against Borce Ristevski's nine-year jail sentence for the manslaughter of his wife Karen in 2016 on the grounds that the sentence and the non-parole period are "manifestly inadequate".

Key points: Victoria's DPP lodged the appeal against the sentence and the non-parole period

Victoria's DPP lodged the appeal against the sentence and the non-parole period The case will be head in the Court of Appeal

The case will be head in the Court of Appeal Borce Ristevski pleaded guilty to one count of manslaughter and was sentenced to nine years in jail

The appeal was lodged by Director of Public Prosecutions, Kerri Judd, QC, in the Court of Appeal.

Ristevski, 55, never explained how he killed his wife on the morning of June 29, 2016, despite pleading guilty to manslaughter.

Ms Ristevski, 47, died at the couple's home at Avondale Heights, in Melbourne's north-west.

Ristevski dumped her body in bushland near Mount Macedon and denied any involvement in her disappearance up until the eve of his trial.

By the time her remains were found in February 2017, the cause of her death could not be determined.

Ristevski was sentenced on April 18 to nine years in jail and was ordered to serve a non-parole period of six years.

Taking into consideration the 491 days in jail Ristevski had already served at the time of sentencing, he could be eligible for parole in less than five years.

Borce Ristevski told police he had argued with Karen about money before she disappeared. ( Supplied )

Ristevski's deception

Ristevski was initially charged with murder but ultimately pleaded guilty to manslaughter after the trial judge ruled evidence of his conduct after her death could not be used to prove murderous intent.

The case against him was built around a series of contradictory and misleading statements he gave to police, family and friends in the months after his wife's disappearance.

Karen Ristevski was last seen leaving her Avondale Heights home in June 2016 ( Supplied )

Court documents detailed how Ristevski sought to deceive police and family members — including their daughter Sarah — during the investigation including by changing phone numbers multiple times and warning a relative that police were "listening".

Ristevski changed his story about the morning of her disappearance several times, telling police they had an argument about money and she walked out of the family home to clear her head.

Phone records showed Ristevski did not call any family or friends about Ms Ristevski's whereabouts after she disappeared.

He reported his wife missing 24 hours after killing her.

The sentence sparked outrage over Victoria's sentencing laws.

It was slammed by domestic violence organisations questioning whether the sentence reflected community attitudes.

When Ristevski was sentenced, Karen's brother Stephen Williams said nothing would bring his sister back but "we didn't get justice at all".