The former head of the Comancheros bikie gang has been sentenced to at least 21 years in jail for murdering a man during a brawl at Sydney Airport. Mahmoud "Mick" Hawi faced sentencing in the New South Wales Supreme Court this morning, after he was found guilty of murder in November. Hells Angels associate Anthony Zervas died when a fight broke out between the rival bikie gangs at the airport's domestic terminal in March 2009. The 29-year-old suffered massive head injuries and stab wounds as he was attacked with metal bollards, kicked, punched and stomped on as he lay on the ground. Witnesses have described the brawl as shocking and violent. Hawi was Comancheros national president at the time. In court today he was sentenced to a minimum of 21-and-a-half years in jail, with a maximum of 28-and-a-half years. The sentence also covers a second offence of affray. Hawi has already served three years of the sentence since his arrest pending the outcome of the case. He will be eligible for parole in November 2030. In sentencing, Justice Robert Hulme told the court that while Hawi may not have inflicted the fatal blow, his role as president meant he authorised and approved the attack. Justice Hulme said Mr Zervas was killed in retribution because he had attacked the Comancheros boss during the fight. Mr Zervas's mother, Frederica Bromwich, was at court to hear the sentence. "I want to thank the judge for the sentence, even though no punishment is enough for the loss of my son," she said. "I just pray that he gets the punishment he deserves. My son didn't deserve to die, not that way."