He became part of Palermo's informal Antimafia Pool, created by Judge Rocco Chinnici. This was a group of investigating magistrates who closely worked together sharing information and developing new investigative and prosecutorial strategies. Most important, they assumed collective responsibility for carrying Mafia prosecutions forward: all the members of the pool signed prosecutorial orders to avoid exposing any one of them to particular risk, such as the one that had cost judge Gaetano Costa his life. Along with Falcone, the group included Paolo Borsellino, and .