Quarto Grado, previews tonight: Chiara Poggi's murder, who is Unknown 3? The latest on DNA testing

A new episode of Quarto Grado , the program that every Friday at 9:25 pm on Rete 4 recounts current affairs and mysteries, hosted by Gianluigi Nuzzi and Alessandra Viero . This evening, the episode opens with the Chiara Poggi case. Investigators continue their search for definitive answers. Who does the profile of Unknown Person 3 , discovered by the new investigations, belong to? Is it a taint or the signature of one of the possible attackers?

During the episode, the program also returns to the Liliana Resinovich case. Investigators are focusing on the sharpening machines found in Sebastiano Visintin 's home: Lily 's husband claims they are a false lead.

The interventions of experts and guests have been confirmed, with Carmen Pugliese, Luciano Garofano, Massimo Picozzi, Caterina Collovati, Carmelo Abbate, Grazia Longo, Umberto Brindani, Marco Oliva and Paolo Colonnello .