Athan Boursinos, 21, was gunned down in a laneway behind a Champions Parade home in the outer northern Melbourne suburb of Wollert before 9am on July 31 last year.
Detectives from the Homicide Squad were searching Jack Roper Reserve in Glenroy on Monday morning as part of their investigation.
Police believe items connected to the shooting may have been dumped in the area.
A motive for the shooting has not been been identified but investigators confirmed Boursinos had extensive links to organised crime.
He was treated as a suspect in the high-profile 2025 shooting death of former Mongols bikie Sam "The Punisher" Abdulrahim.
Police believe Boursinos' shooting was carried out by four men, including two contracted killers from a NSW organised crime group and two Victorian men who assisted with transport and accommodation.
CCTV footage released on Thursday showed the suspected getaway car used to flee the scene being set alight.
In the footage, a man dressed in black can be seen running from the white Nissan Patrol vehicle along Amery Street in Reservoir as it goes up in flames.
The car, which was found burnt out about 9.15am on the day of the killing, was stolen from a Reservoir address in June 2025.
Investigators believe three offenders then travelled to a Dallas home, northwest of Reservoir, using a grey Volkswagen Golf, which had also previously been stolen.
Detectives have also released CCTV footage of the trio leaving that property and entering a separate vehicle at about 11.50am.
The Isuzu D-Max is believed to have been driven there by the fourth alleged offender and was then used to drop two of the men off in Reservoir.
It was then used to transport the remaining pair to the Glenroy area, before it was discovered burnt out on Rosehill Boulevard in Mickleham.
The investigation remains ongoing, police said.
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