The devastated mother of Marcus Rowley said justice wasn't done for her son who was fatally stabbed by a stranger and left to die by a Melbourne road.
Cody Frost plunged a chef's knife into 24-year-old Marcus Rowley's back at West Footscray in August 2017 and left him to die.
"He murdered my son and justice wasn't done," distraught mum Carolyn Brooke told reporters outside the Supreme Court where Frost was sentenced on Thursday.
A jury found Frost not guilty of murder but guilty of the lesser crime of manslaughter in April.
On Thursday he was jailed for ten years and six months, and must serve at least seven years and nine months before being eligible for release on parole.
But Mr Rowley's older brother labelled the sentence "ridiculous".
"He's killed my little brother and he's got ten years for it, it's ridiculous," Nicholas Brooke said.
"There was absolutely no remorse."
The 37-year-old killer claimed he acted in self-defence after Mr Rowley followed him and a female friend after the trio alighted a train at Tottenham station.
The victim had been "obnoxious and at times confrontational" on the train with passengers, before he approached Frost for a cigarette at the station.
Frost gave him his last one and called him "mate" before Mr Rowley followed them.
Justice James Elliott told the Supreme Court there was no evidence Mr Rowley had his arms up as he approached Frost, but accepted the killer may have felt threatened during the incident.
"There is no proper basis to find Mr Rowley came at you in a such a manner that would allow you to believe, reasonably or otherwise, that it was necessary to insert a large knife 19 centimetres into his upper body," Justice Elliott said on Thursday when sentencing Frost.
"Such an act was plainly disproportionate and unwarranted."
Frost did not realise Mr Rowley had died until the next day when his friend told him about a news report and he handed himself in along with the knife.
Frost, who has been diagnosed with schizophrenia, was annoyed and angry when he stabbed Mr Rowley, but was unlikely to have been suffering psychosis at the time, the court was told.
Frost had a propensity for fabricating triggers from his victims to explain his actions, an expert found.
Frost suffered an acquired brain injury after being shot in 2004, has a lengthy criminal history and had a challenging upbringing.
He used drugs including ice, cannabis, pills and alcohol daily in the lead-up to the killing, and had stopped taking his anti-psychotic medication four days prior.
Frost has shown "little, if any remorse", the court was told.
Frost has already spent 795 days in custody, and is likely to be deported to New Zealand on his release.
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