chunk: Three years later, Vito and Carmela have had two more sons, Fredo and Michael. Vito's criminal conduct attracts the attention of Fanucci, who extorts him. His partners, Clemenza and Salvatore Tessio, wish to avoid trouble by paying in full, but Vito insists that he can convince Fanucci to accept a smaller payment by making him "an offer he won't refuse". During a neighborhood festa, he stalks Fanucci to his apartment and shoots him dead.
  In Washington, D.C., a Senate committee on organized crime is investigating the Corleone family. Having survived the earlier attempt on his life, Pentangeli agrees to testify against Michael, who he believes had double-crossed him, and is placed under witness protection.