Assembled outside of the hospital, Mr Machar’s family members told the media they had no idea who was responsible for the shooting.
Susana Manyieo pleaded with her relative Mr Machar’s attackers to hand themselves in.
“If you’re out there, please, he’s a very young boy and he didn’t do anything,” she told Nine News on Saturday.
“You have to show yourself and report to the police.”
It’s unclear whether the parties were known to each other.
The stolen car had been driven around Chapel Street for 30 minutes before the shooting. Up to 100 people were congregating in Grey Street when the shooting took place, after leaving an R’n’B night at the Chapel Street nightclub Chasers just under an hour earlier.
Mr Machar’s father, Chol Mathiang, found out his son had been shot in an early morning phone call and rushed to The Alfred hospital to be by the 19-year-old’s bedside.
“It’s my son, I have to take care of him,” he told Nine News.
Ms Manyieo said the family had been shocked by the gun crime emerging within the city, and said Mr Machar was not part of any gangs.
“In Australia, there’s nothing like America where [people] have guns. So we’re really surprised about the gun and that this has been going on here in Melbourne.”
The incident follows the fatal shootings of security guard Aaron Osmani and patron Richard Arow outside Prahran nightclub Love Machine on April 14 last year.
Detectives would like to speak to anyone who saw the Audi in the Chapel Street area before Saturday’s shooting. Anyone with information should contact Crime Stoppers on 1800 333 000.
Ashleigh McMillan is a breaking news reporter at The Age. Got a story? Email me at email@example.com
Erin covers crime for The Age. Most recently she was a police reporter at the Geelong Advertiser.