Who got sonny corleone shot?

Sonny Corleone was shot at a toll booth in "The Godfather" by rival mobsters working for Barzini, specifically orchestrated by his own brother-in-law, Carlo Rizzi. Carlo betrayed Sonny by informing Barzini about his movements, leading to the ambush. This betrayal ultimately sets off a chain of events that deepens the conflict between the Corleone family and their enemies.