Falcone received an effusive congratulatory phone call from Giulio Andreotti after the narrow escape. Falcone privately thought it odd that Andreotti, who he had never spoken to, would suddenly contact him, and he mused about the significance of the incident to a friend. Unknown to Falcone the efforts to kill him were suspended while the Maxi trial verdicts went through the appeals process that had often set convicted Mafia members free. Later investigations into the murders of two police officers, Antonino Agostino and Emanuele Piazza, who worked for the secret service, revealed that they had secretly defused the bombs that had been placed by a Mafia commando aided by other secret service men. Agostino and his wife were killed on 5 August 1989 outside their home, and Piazza on 15 March 1990.