The analysis of the investigative journalist Alessandro Politi on one of the most discussed cases of the Italian news. A silent house. A slaughtered student. No witness. It is November 2, 2007 when the 21 -year -old British student Meredith Kircher is found lifeless in her room in Perugia. The only condemned is Rudy Guede, but something for investigators does not return: the reminder DNA on the bra later denied, the “dirty” but contested knife, the accusation of Amanda to an innocent, the violation of his rights, the sidetracks, the versions that change.