During those years, working together with magistrates Falcone and Chinnici, Borsellino continued his research about the Mafia and its links to political and economical powers in Sicily and Italy. He became part of Palermo's Antimafia Pool, created by Chinnici. The Antimafia pool was a group of investigating magistrates who closely worked together sharing information to diffuse responsibility and to prevent one person from becoming the sole institutional memory and solitary target. The group consisted of Falcone, Borsellino, Giuseppe Di Lello and Leonardo Guarnotta.