Police release new footage in Altona killing of Athan Boursinos, 21

Victorian homicide detectives are appealing for public help after releasing new footage connected to the investigation into the execution-style killing of a young man in Melbourne's western suburbs.

Athan Boursinos, 21, was shot multiple times in a laneway near his home in Altona in July last year. The shooting has been described by investigators as a targeted, execution-style attack.

Boursinos had links to Melbourne's underworld and was the son of a former Victoria Police officer, a detail that has drawn significant attention to the case since his death.

Homicide Squad detectives released the new footage in hopes that members of the public may be able to identify vehicles, individuals, or circumstances captured around the time of the fatal shooting.

The laneway killing shocked the tight-knit Altona community and sparked an ongoing major crime investigation that has stretched for more than a year without a public arrest being announced.

Victoria Police have not disclosed the specific content of the newly released material but confirmed it forms part of a broader evidence-gathering effort to identify those responsible for the murder.

Investigators continue to urge anyone with information about the shooting — including knowledge of movements in and around the Altona area on the night in question — to come forward. Tipsters may contact Crime Stoppers Victoria on 1800 333 000 or submit information online, with anonymous reports accepted.