Melbourne's Bourke Street killer James Gargasoulas has begun his minimum 46-year jail term in protective custody for murdering six people in a "callous and cowardly" driving rampage.
The 29-year-old was sentenced on Friday to six life sentences for committing one of Australia's "worst examples of mass murder".
Having served two years already, Gargasoulas will be eligible for parole in 2063, aged 73.
Family members of his victims called the sentence "disappointing", adding that the killer should never have the chance of freedom.
"Some feel that he shouldn't have been granted parole at all," said Genna Angelowitsch from Adviceline Injury Lawyers, on behalf of five families.
"They have a life sentence. They don't get parole from their grief."
Gargasoulas used a stolen Holden Commodore to mow down and kill six people and injure dozens more in the busy Bourke Street mall on January 20, 2017.
His victims included three-month-old Zachary Bryant, who was thrown 60 metres from his pram, and 10-year-old girl Thalia Hakin, who was holding her mother's hand when struck.
"This was one of the worst examples of mass murder in Australian history," Victorian Supreme Court Justice Mark Weinburg said as he jailed Gargasoulas.
"You actions were were both callous and cowardly.
"The horror of what you did has profoundly impacted the lives of those who were present that day."
Australian Associated Press