Unreported World travels to one of the most remote parts of the world, to investigate the growth of 'witch' murders in Papua New Guinea. More than fifty people accused of being witches were tortured and murdered last year in two provinces alone and the programme reveals that the problem is now spreading from remote highland areas into the towns. Reporter Ramita Navai and producer Katherine Churcher meet the victims, the so called witch hunters and the police struggling to keep order.