The brother of slain Sydney underworld figure Mahmoud "Brownie" Ahmad will remain behind bars because police fear he is planning an attack in retaliation.
The Federal Court has dismissed Youssef Ahmad's appeal against the revocation of his parole, ruling it was satisfied with police intelligence the 33-year-old posed a risk to the community
Ahmad had been granted parole in July after serving jail time for drug offences, when the Attorney-General's department received an urgent request from NSW Police he be returned behind bars.
The request, which was tendered in court, showed police believed Ahmad was "at extreme risk of being murdered".
"It has further been identified that Youssef Ahmad is planning retaliation attacks to murder members of the Comanchero OMCG," the letter read.
"In light of the seriousness of the investigations and intelligence that you are planning retaliatory attacks, the delegate of the Attorney-General decided to revoke your parole order without notice."
Ahmad's brother Mahmoud Ahmad was shot dead in Greenacre in south-west Sydney in April, and his nephew Rami Iskander was killed a month later in what police say is an ongoing dispute between the Ahmad network and the Comanchero bikie gang.
In between those slayings, high-ranking Comanchero Tarek Zahed and his brother Omar Zahed were shot by a masked gunman at an Auburn gym.
Tarek survived, despite being hit 10 times, but Omar died at the scene.
The court heard police allege it was part of a gangland tit-for-tat, with that shooting being revenge for the killing of Ahmad, and Iskander's death a reprisal for the attack on the Zaheds.
Lawyers representing Ahmad requested more evidence from the Attorney-General that their client was planning an attack in retribution.
"Your letter ... makes a series of vague, generalised assertions concerning 'information' and 'intelligence' to which the delegate had regard without disclosing that information, or why such information amounted to reasonable grounds to suspect a breach of condition 1," the lawyers wrote.
The Attorney-General's department responded again, saying it could not give any more evidence about the nature of the alleged planned attacks "...due to confidentiality and for the protection of NSW Police holdings."
In her judgment, Justice Wendy Abraham said Ahmad did not provide a submission to the court denying he was planning an attack, and that in the context of ongoing bikie violence, NSW police intelligence was credible.
"The material before the Delegate was sufficient for a reasonable person to be satisfied that there are reasonable grounds to suspect the applicant had breached the first condition of his parole," Justice Abraham said.
Ahmad is now due to serve the remaining eight months of his sentence behind bars, unless the parole revocation order is rescinded.
