Twenty eight-year-old Luca Traini, who is suspected of carrying out a drive-by shooting in Italy's Macerata was determined in his actions and has shown no remorse over his crime, Lt Col Michele Roberti, the Carabinieri commander in Macerata, told Italian news channel Sky TG24 on Sunday.
While searching Traini's home, the police found a copy of Adolf Hitler's Mein Kampf, publications linked to Nazism and a flag with a Celtic cross, usually used by white supremacists.
According to the local authorities, the young Italian man was an unsuccessful candidate in a local election for the anti-immigration Northern League party. Italy's Ansa news agency reported that Traini had ties with the neofascist Forza Nuova and CasaPound parties.
The Carabinieri commander further noted, "it's likely that he carried out this crazy gesture as a sort of retaliation, a sort of vendetta" for the death of a teenager a few days earlier.
Last week, the police arrested a Nigerian man in connection with the murder of 18-year-old Pamela Mastropietro, whose dismembered remains were found in two suitcases. During the search, the police found several pieces of evidence, including the girl's bloody clothes and a receipt from a pharmacy in the suspect's house.
Commenting on the incident, Italy's Prime Minister Paolo Gentiloni warned that "the state will be particularly severe against whoever thinks of feeding the spiral of violence."
Italy has been struggling with a huge immigration inflow for the last several years, with the majority of migrants coming across the Mediterranean in smugglers' boats.