Banco Ambrosiano
In July 1991 the pentito Francesco Marino Mannoia claimed that Di Carlo had killed Roberto Calvi, nicknamed "God's banker", because he was in charge of Banco Ambrosiano, in which the Vatican Bank was the main share-holder. Calvi had been killed because he had lost Mafia funds when Banco Ambrosiano collapsed. The order to kill Calvi had come from Mafia boss Giuseppe Calò.