Brother of first suspect injured with machete, arrested. Rocco Costanzia di Costigliole is brother of Pietro, the 23-year-old arrested on March 20 by the police for attempted murder.
The investigators are working to clarify the motive: they suspect that behind the attack there is not only revenge for a message of appreciation sent by the victim to a friend of the other. In fact, the trail leading to drugs has not been ruled out, police say.