While Ettore's PC is being analyzed by the Police, Sara identifies the punkest couple. Valerio traces them to a recovery community, where the girl says that Ettore did not jump into the river, but was thrown into the water by two men.
The shoe that Valerio found on the banks of the Tiber actually has traces of another place. As the former scientific colleague Alessandro explains to him, Ettore may have found himself in one of the quarries in Tivoli. Valerio asks Arturo, a retired canine agent, to accompany him along with the Gandalf hound. In a stretch of water in the quarry he finds a shirt that belonged to Ettore.—Canon y mus