New security footage has been released of what police say is two men watching a bikie associate shop in the Sydney CBD hours before he was killed in a brazen daytime execution.
Detectives, who have already charged seven people over 24-year-old Marvin Oraiha's shooting death, last night released CCTV vision of several key moments from the day he died in Sydney's west.
Police said they wanted to speak to "some additional men" shown in the footage, without giving further details.
Police allege one clip shows an offender running away after the May 22 shooting, pointing a gun at civilians.
In an earlier clip, two men can be seen texting as they look over escalators at Westfield Sydney on Pitt Street in the CBD about 1.10pm.
Police said they were "seemingly" watching Oraiha, who had links to the Comancheros bikie gang.
Almost two hours later, separate CCTV captured a man in a black Under Armour hoodie parking a black Mercedes on Boomerang Road in Edensor Park, about 30 kilometres west of the city centre.
Police said the "unknown offender" got a bag from a dark Toyota Kluger before getting back in the Mercedes.
At 3.35pm more vision shows the Mercedes meeting up with a white Audi on Eber Avenue in Elizabeth Hills, around the corner from Oraiha's house on Hertfordshire street.
Two men, including one with a backpack, got into the Audi, which police allege travelled on to wait for Oraiha at his home.
Straight after the shooting more CCTV shows two men running from a black Prado towards a blue Honda Accord on Lewis Street in Bonnyrigg Heights, as one allegedly points a gun at civilians
Those already charged remain before the courts.
Anyone with information about the shooting or the men in the CCTV footage should call Crime Stoppers on 1800 333 000 or its website.
