Diego was kidnapped by the criminal named Pulpo, because Antonio was the one who got him arrested. Pulpo was in prison but his men took Diego from their home. He was saved but it deeply upset Antonio. After this and Antonio getting shot, Laura had enough and told Antonio to quit. After he didn't, she left him.
Diego came to visit Antonio for his birthday but they had a falling out, because Antonio was too harsh on Diego over something he wanted to buy and Antonio wouldn't let him.