All I have S01 E04 Episode 4

The Santovito family is falling apart: Lavinia and Matteo are increasingly estranged, while Roberto steals his father's service pistol to take justice into his own hands. Meanwhile, Lavinia must accept what seems like an inescapable reality: Kevin is guilty, all the evidence against him. Is this really the case? Or is there an alternative truth? What if Matteo himself were to question his own certainties?