Protesters rallying outside Sydney's Town Hall called for justice for David Dungay, an Aboriginal man who died in a Sydney prison in 2015.
Dungay, who was schizophrenic and diabetic, died in Long Bay Prison Hospital after he was overpowered and restrained by at least four prison officers, according to a press release sent to CNN by his family's lawyer, George Newhouse, of the National Justice Project.
Dungay's family is calling for criminal charges to be brought against the correctional officers involved in his case.
Speaking at a press conference on Wednesday, the boy's mother, father and sister -- who asked not to be named by the media -- said the actions of the junior constable, who arrested and later freed their son without charge, were "dangerous and uncalled for." They have called for charges to be brought against the officer.