The new documentary by Italian directors Valentina Cicogna and Mattia Colombo, Pure Unknown, has its North American premiere at Hot Docs this week after bowing at Visions du Réel in Nyon. The co-directors follow Dr. Cristina Cattaneo, a forensic pathologist and anthropologist, founder, and director of LABANOF, the Laboratory of Anthropology and Forensic Odontology at the University of Milan.