The brothers of Skaf gang rapist Mohammed Sanoussi have been charged over a bashing on the same day he was granted parole.
The news comes after the NSW government revealed it would considering appealing against the parole because "some new and relevant information" was not available at the parole hearing.
The parole authority granted Sanoussi parole under strict conditions on Thursday, including a ban on him associating with the Brothers For Life gang.
Police opposed parole, alleging that members of Brothers 4 Life had been meeting at Sanoussi's family home and his family's had links to the gang.
In court, Judge Terence Christie conceded it appeared Sanoussi's two brothers were members of the gang.
It is believed his two brothers were arrested on Wednesday, along with a cousin and another man.
Police confirmed Ahmed Sanoussi, 30, and Mahmoud Sanoussi, 28, both believed to be his brothers, were charged with bashing a cleaner at Revesby in Sydney's southwest.
Muhammad Sanoussi, 29, believed to be his cousin and another man, 31-year-old Ar'med Bre'aery were also charged.
The men also intimidated a police officer who came to help the man.
Three of the men were given conditional bail in court on Thursday except Mahmoud Sanoussi who is behind bars.
The father of a Skaf gang rape victim is furious that one of the rapists will be released on parole, saying he should rot in jail.
"Let them rot, who cares," he told the Nine Network.
"They don't pay the price.
Sanoussi was sentenced to 16 years in prison for his role in the August 2000 gang rapes of young girls in isolated locations in Sydney's west.
He was 16 at the time of the horrific attacks involving 14 men, led by brothers Bilal and Mohammed Skaf.
Outside court, Sanoussi's lawyer Ruth Layton told reporters she was confident her client would not go back to jail.
"He is utterly changed since the teenager who committed that offence," she said.
The authority had rejected three previous parole applications from Sanoussi.
Judge Christie said Sanoussi's prison performance had been satisfactory and he'd completed programs to address his behaviour.
The judge told the court the parole board was "anxious to ensure he obeys every condition of the parole", of which there are 30 strict conditions.
If the parole remains, he will walk from jail within the next month after serving 13 years.
