(ANSA) – Rome, October 12 – The Palermo prosecutor's office will contend a case at the Constitutional Court brought by President Giorgio Napolitano over its handling of wiretaps recorded during a probe into alleged State-Mafia negotiations in the early 1990s. The prosecutor's office deposited the necessary legal documents on Friday, a week before the deadline of October 19. The case centres around recorded conversations between Napolitano and Nicola Mancino, former interior minister, senate speaker and vice president of the Superior Council of Magistrates, who was under investigation at the time. The Italian president asked the Constitutional Court to intervene, saying that magistrates overstepped their powers by wiretapping the conversations and failing to destroy them afterwards, as the Constitution mandates. The documents presented by Palermo magistrates on Friday contain records of four recorded conversations between Mancino and Napolitano between November 2011 and May 2012. Police did not transcribe the conversations, the prosecutors say. The case is due to be heard on December 4.