Considering the weakened state of the Outfit I don't think the Sicilian Mafia can be ruled out. Giacomo Ruggirello suddenly left everything to his Corleonese friend. Why? Did he have a debt to someone in Corleone? There are a lot of details that we aren't privy to, and without knowing all the facts I don't think we can presume that the Outfit was involved if this was organized crime-related.
Ruggirello's bakery was first located in Cicero in the 1990s and he became very friendly with the boys there...specifically the Spano brothers, Solly D and others -- they frequented his bakery in Cicero and when he opened a restaurant in Highland Park they continued coming. Whether he was loaned money is another question, but my theory is that the Outfit was behind this.
