(ANSA) - Vatican City, September 27 - Pope Benedict XVI's former butler Paolo Gabriele's main worries are for his children ahead of the start of his trial this weekend for being in illegal possession of confidential Church documents. "At the moment Paolo's main concern is for his children, above all the distress in their lives caused by the media impact (of the case)," a source close to Gabriele's family told ANSA. The trial of the butler, who is charged with aggravated theft, is due to start on Saturday. Gabriele was arrested in May following probes into the leaking of sensitive Vatican documents to the media in a case that was dubbed 'VatiLeaks'. He is currently under house arrest after spending two months in a Vatican cell following his detention, which shocked the Catholic world. A Vatican IT expert, Claudio Sciarpelletti, will also go on trial on the lesser charge of aiding and abetting.