A man shot dead in broad daylight in the driveway of his Sydney home had been linked to underworld killings and was well known to police.
Hamad Assaad died at the scene after being gunned down by at least two men in the targeted attack in Georges Hall on Tuesday morning.
Police would not speculate on reports Mr Assaad, 29, was a key suspect in the April shooting of underworld figure Walid Ahmad, who was killed on the rooftop car park of Bankstown Central shopping centre.
Mr Ahmad's killing was believed to be in retaliation for a shooting outside a Condell Park panel beater two weeks earlier that killed Safwan Charbaji.
Six years ago Mr Assaad was acquitted of the murder of Mohamad Alahmad, who was shot six times in his BMW in the driveway of his Granville home in 2007.
Police said Mr Assaad was known to both the Middle Eastern Organised Crime squads and the organised crime squads within the NSW police.
"He is known for a number of reasons with regards to criminality and organised crime," Detective Chief Inspector Grant Taylor said.
Mr Assaad's body remained in the driveway of the Sturt Avenue home under a white sheet for several hours as scores of police surrounded the house in Sydney's southwest
"These individuals wanted to kill him," said Det Chief Insp Grant Taylor said.
Mr Assaad, who's believed to be a father, was leaving his home when the gunmen got out of their car and shot him before fleeing.
Mr Assaad's grandmother was in hysterics on Tuesday when police refused to let her enter the crime scene.
She told AAP in Arabic she wanted to be let in to see her grandson.
"I raised him when he was young," she said.
"Why won't they let me in?"
"He has a son."
Mr Assaad's mother, who was in the home when her son was fatally shot, had been hysterical following the shooting, police said.
Mark Everingham, who works in a pool shop around the corner from the crime scene, said he saw a black car speeding along the street.
"I heard a noise which I thought was a car backfiring and a black car sped along the street and turned. It didn't even stop at the end of the street, it just went," he said.
Police are appealing for the public's help in finding a black sedan, possibly an Audi, seen speeding from the scene.
"I have no doubt that it was loitering around the area, several minutes before the event. It is very important for people to come forward," Det Chief Insp Taylor said.
