Alessandro Uccello, born in 1969, was killed by gunfire in Via Bakù in Scampia shortly after 9 p.m., according to Il Mattino.
The report says Uccello was returning to prison at the time under a semi-liberty regime. It also reports that he had recently been assaulted.
The Carabinieri are conducting the investigation and carried out the initial forensic work at the scene.
Investigators had not ruled out a connection between the killing and the recent shooting of Mariano Abete, the report says. That possible link was presented as an investigative hypothesis, not a confirmed finding.
No motive has been established and no shooters have been identified in the source acquired for this brief.