What does Joey do after Saul goes home?

After Saul gets home and goes to bed, Joey bursts into his room. Joey grabs Saul and slams his head against the wall. Then Joey berates Saul for what he did to his daughter. Saul realizes that the Joey Colicchio in front of him with his hands around his throat is the murderer. Saul realizes that Joey might kill him. Joey pulls a pistol and asks if Saul loves Sofia. Then Joey tells him the first rule of fatherhood is that it is not about you.