Aging mobster who secretly plots against Michael in Part III.
Their apparent alliance conceals Altobello's betrayal.
Altobello tells Michael he can diplomatically resolve the dispute after the conference attack, while secretly plotting against him.
Vincent becomes Michael's covert source inside the enemy network.
Michael orders Vincent to pretend to defect so he can spy on Altobello and uncover the conspiracy.
Altobello uses his relationship with Zasa during the power struggle.
Altobello leaves the conference to speak with Zasa and claims he can resolve the dispute diplomatically.
Altobello directs the operation through hired violence.
Michael learns from Vincent that Altobello hired someone in Sicily to assassinate him; Mosca is the assassin who carries out the attack.
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Related entry on Wikidata (Q1132754), public domain (CC0).