What happened at 10 Rilllington Place was so shocking and gruesome that even today everyone over a certain age still remembers the case with a shudder. In 1950, Timothy Evans was hanged for the violent murder of his baby daughter; he was also assumed to have murdered his wife. Then, less than three years later, another tenant, John Christie, was found to have killed at least six women, hiding their bodies in the garden, under floorboards and in a concealed kitchen alcove. Christie followed Evans to the gallows. It seemed unlikely that two murderers were living at 10 Rillington Place, and the...