From the late 1970s to the early 1980s the Yorkshire Ripper murdered thirteen female victims and attacked at least seven more women around the north of England.
The fascinating follow-up to the story of Dede Kosawa and his American doctor, Dr Anthony Gaspari, as they battle to find a cure for his unique condition
David Koppel is hoping that the Clan will agree to be medically examined to learn more about their conditions, but one member's family is not keen on the idea