Francesco Marino Mannoia is a former member of the Sicilian Mafia who became a pentito in 1989. His nickname was Mozzarella. He is considered to be one of the most reliable government witnesses against the Mafia. Antimafia magistrate Giovanni Falcone, who was first to interrogate him, recalled Marino Mannoia as an intelligent and reliable witness.

The Sicilian Mafia or Cosa Nostra, also referred to as simply Mafia, is a criminal society originating on the island of Sicily and dates back to the mid-19th century. It is an association of gangs which sell their protection and arbitration services under a common brand. The Mafia's core activities are protection racketeering, the arbitration of disputes between criminals, and the organizing and oversight of illegal agreements and transactions.