There is one arrested for the murder of Andrea Fiore, the 54-year-old killed on the night between Sunday and Monday in his apartment in via Pisoni, in the Torpignattara area.
The detention was carried out by the Flying Squad.
Investigators do not exclude that Fiore's death can be traced back to a sort of war between criminal groups, even small cabotage ones, which divide up the drug dealing squares in the eastern quadrant of the capital.
The man arrested is a 43-year-old Italian.
He is accused of having killed Fiore with a gunshot to the chest shortly after midnight on Sunday.
After the ambush it was the same victim who called the police for help: the agents who arrived a few minutes later found him lifeless in the apartment a short distance from the entrance door.