Thanks for the info. I guess they still haven't released the identity of the other 40 year old person that was shot and survived.
A just-published article--link is below--reveals that Saverio Serrano was the victim. It also indicates that Saverio and Silvio Serrano are in fact Diego Serrano's sons, which I guessed at but was never able to confirm.
Their old man is a major player with strong links to Calabria. Sad the girl was killed.