DNA samples lead police to a 45-year old man named Massimo Bossetti. His DNA is a perfect match for Unknown Male 1, and he is arrested. Italy is transfixed; the killer appears to have been found. But inside the prison cell, a different story unfolds. Bossetti is an innocuous father of three with no history of violence. And as the defence investigates the details of the case, holes begin to emerge.
