The Carabinieri del Ros are searching, in Bagheria, the homes of Maria Mesi, former lover of the boss Matteo Messina Money, and of his brother Francesco.
Both have been investigated in the past for having favored the mafia boss's hiding.
Francesco Mesi negotiated the sentence.
The woman was arrested on June 14, 2000. Two other people ended up in prison with her accused of being the holders of the rental contract of an apartment where Messina Denaro was hiding in Aspra, in the Palermo area.
Maria Mesi was sentenced in the first and second degree for aggravated aiding and abetting the mafia.
The Cassation canceled the aggravating circumstance arguing that her sentimental relationship with the boss excluded the facilitation of Cosa Nostra.
Investigators found several love letters that the mafia boss and the woman had exchanged.