Victorian police are hunting two men over the May underworld shooting of 22-year-old Korey Kesici.
Detectives say CCTV may hold the key to finding the Mickleham man's killers, with a man caught on camera near Mr Kesici's house shortly before the shooting and a second pictured filling a red ute at a petrol station.
Officers believe the man near Mr Kesici's residence was involved in the shooting.
The ute - a stolen red Holden Commodore with false number plates - was involved in a drive-off at a service station on the corner of Main Street and Edgars Road at Thomastown in Melbourne's north about 11pm on May 4.
Half an hour later, it was travelling in a convoy with a white BMW on Donnybrook Road in the direction of Mickleham.
After midnight, on May 5, Mr Kesici walked out of his house on Bangalore Way at Mickleham and started speaking to a man or men inside a white BMW parked in the street.
It was after he approached that he was shot a number of times and the BMW sped off.
Mr Kesici died at the scene while the vehicle was found on fire a short time later on St Georges Boulevard.
The red Holden ute was also found alight about 7.30pm on May 6 at Beveridge.
Police have pored over thousands of hours of CCTV footage as part of their investigation and are calling for public help to identify the two men.
The BMW and the ute were stolen - from Tyabb in Melbourne's southeast on March 27, and Maribyrnong in the city's northwest on April 8.
Adding to the complexity of the investigation, police say Mr Kesici had connections to a number of organised crime groups, including outlaw motorcycle gangs.
"What is clear to us is that this was a deliberate, targeted organised crime hit. It was more than a simple street exchange - Korey's murder involved a confronting level of public violence," Detective Acting Superintendent Dean Thomas said on Thursday.
"We are hopeful today's appeal provides us with further avenues of enquiry.
"Korey's heartbroken family deserves answers as to why this happened and we will do everything we can to help provide those answers."
Police released CCTV footage on Thursday of the two stolen cars in convoy, the man outside Mr Kesici's house, the petrol station drive-off, and the burnt out ute.
The shooting itself was also captured on CCTV but was too graphic to release, Supt Thomas said.
