There's something very sinister about this hit, for starters, the girl was likely just a girlfriend, and it seems rather unusual for the Mob to hit someone innocent unless it was accidental.

Another weird thing about this is the person they hit is not someone known to LE despite the surname. So either they never knew about him and he was involved, or he got hit because he's a relative of the Commisso boss and the fact that he carries the same first name could be a message.

I wonder if this is retaliation to the Musitano hit, but the dead GF could indicate to a non-Italian group all together, Mexican Cartel perhaps? Who's knows.