(see related) Naples, January 14 - Ignazio Baiano, the husband of Quarto Mayor Rosa Capuozzo, is under investigation for alleged false declarations and alleged breach of construction regulations, ANSA sources said Thursday. This may have been used in an attempt to blackmail Capuozzo by a former councillor at the centre of allegations of mafia infiltration in the local authority, Giovanni De Robbio, the sources said. Capuozzo has been expelled from the anti-establishment 5-Star Movement (M5S) after ignoring its calls for her to resign in the wake of the mafia-infiltration scandal. De Robbio was expelled from the M5S before Capuozzo was.