Rosemary Pauline West is an English serial killer who collaborated with her husband, Fred West, in the torture and murder of ten young women between 1973 and 1987; she also murdered her eight-year-old stepdaughter Charmaine in 1971. From Wikipedia
The 2011 series, now streaming on Netflix and ITVX, revisits the chilling case through the lens of Janet Leach, Fred West's court-appointed 'appropriate adult.'