Rosemary Franzidis, 69, died in a high-impact collision at Murrumba Downs, north of Brisbane on Thursday after an Audi was allegedly stolen by a 16-year-old at gunpoint.
The boy is in custody on a string of charges including manslaughter, and a 35-year-old woman has also been arrested as part of the investigation into the fatal crash.
The boy's grandmother apologised to Ms Franzidis' family and also took aim at the state's legal system for releasing repeat juvenile offenders.
She said her grandson came from a loving home but had strayed down a path of crime, appearing before the courts previously.
Asked if she wanted to see her grandson released, she told Nine Network: "No ... hold these animals accountable for what they're doing.
"They're not kids, they're animals.
"When you go up to court 16 times and breach your bail, who let him out?"
The grandmother said the crash could been prevented before reaching out to the victim's family.
"Know from my soul that I am so, so, so, so deeply, sincerely, and heartfelt sorry," she said.
A GoFundMe has been set up for Ms Franzidis' husband to assist with funeral expenses, raising almost $7000 by Monday afternoon.
"They have three beautiful daughters and three precious grandchildren who will need the love and support of their community as they navigate life without their beloved mother and granny," the fundraiser said.
Police have also charged Racheal Anne Collyer, 35, who they allege tried to steal a car in Newport about 7.45am on Thursday, threatening the female driver with what appeared to be a gun.
Collyer allegedly assaulted the driver before bystanders intervened and she fled in a stolen Holden Barina.
Police say about 15 minutes later, occupants inside the Barina threatened another woman with a gun and tried to steal a handbag before fleeing.
The Barina later arrived at a Griffin address where the 16-year-old boy got out and threatened a woman with a gun before stealing the Audi that was later involved in the fatal crash, police said.
Collyer has been charged with two counts of attempted robbery while in company and armed as well as robbery in company while armed and unlawful use of a motor vehicle.
She was remanded in custody after her matter appeared in Caboolture Magistrates Court on Monday. Her matter is next due in court on Wednesday.
16°C