Valter Lavitola suspected of planning bomb attack on Sigfrido Ranucci, for which four people have been arrested Italian prosecutors have placed a businessman and former journalist under investigation for allegedly masterminding a bomb attack at the home of Sigfrido Ranucci, a prominent investigative reporter. Valter Lavitola is friends with Ranucci, the host of Report, an investigative programme aired by the state broadcaster, Rai, and is being probed on suspicion of trying to cause mass murder