Five men have been jailed for life over the murder of 26-year-old Perth man Patrick Slater, stabbed through the heart with a screwdriver in a group attack in the city's CBD hours after Australia Day celebrations last year.
Mr Slater was assaulted with an array of makeshift weapons including a star picket and a pole near the Esplanade train station in the early hours of January 27.
He died moments after suffering the wound to his chest, which pierced his aorta.
Christopher James Birdsall, Dylan Terrance Wayne Anthony, Clinton Fredrick Mead, his brother Stefan Lazba Mead and Robert Christopher James Pickett were convicted of Mr Slater's murder last month.
Birdsall, who at 29 was the oldest in the group, must serve a minimum of 18 years behind bars, Stefan Mead at least 17 years and Pickett, Anthony and Clinton Mead at least 16.
Two juveniles, who cannot be named, have also been convicted over Mr Slater's death.
One, who has since turned 18, was found guilty of murder and will spend at least 12 years in jail, while the other boy pleaded guilty to the lesser charge of manslaughter on the third day of the trial and was jailed for four years and six months.
He must spend two years and three months in an adult prison before he can be released.
A child who was allegedly part of the group and aged 11 at the time is being dealt with separately in the Children's Court.
Prosecutor Carmel Barbagallo urged Supreme Court of WA Justice Peter Martino to find Pickett, then aged 21, was a leader in terms of aggression.
She said Justice Martino "could be satisfied it was Pickett" who stabbed Slater, adding: "He was aggressive from the very outset that night".
But Justice Martino said he could not determine who dealt the fatal blow.
The court heard the eight males had three increasingly violent fights with Mr Slater's group, which included his two sisters, between 2.45am and 3.30am, starting with verbal exchanges between females from both parties.
Justice Martino said the motive for the attack was revenge after two people were struck with a tomahawk but not seriously injured by a member of Mr Slater's group.
Much of the mayhem was captured on CCTV but the 50-second fatal assault, which happened after Mr Slater was chased upstairs onto the upper concourse of the train station, was not.
Henry Sklarz, defence counsel for Birdsall, said "a group mentality" prevailed.
"My client was very much a sheep that ran with the pack," he said.
The screwdriver and other weapons were found dumped at the nearby Elizabeth Quay construction site.
Ms Barbagallo said the Slater family was broken by their loss.
