It was May 1957, in the small town of Hexham, near Newcastle Upon Tyne in England. 11-year-old Joanna Pollock and her younger sister, six-year-old Jacqueline, were on their way to church with their ...

He remained convinced until his dying breath in 2007 that the twins were the most persuasive case study he had ever come across during decades of research. Yet some members of the Pollock family ...