This story includes descriptions of child sexual abuse that may be distressing to some readers.
It’s not hard to see why Rose West and Myra Hindley were nicknamed the “gruesome twosome” by a prison guard at high-security correctional facility HMP Durham in England’s north.
West and her husband, Fred, carried out the rape, torture, and murder of young women – including their own daughter Heather, 16, and stepdaughter, Charmaine, 8 – in their Gloucester home between the 1960s and 1980s. They became known as the House of Horrors killers.
West was convicted of 10 murders in total, but it’s believed the pair were responsible for more.
Then there was Hindley, who was convicted of killing five children and sexually assaulting four of them during the 1960s, alongside her boyfriend, Ian Brady. Together, they were dubbed the Moors Murderers.
Watch: Insight - Women in Prison. Story continues after video.
West and Hindley were serial killers, and the first two women in the UK to be handed life sentences. And it's their horrifying commonalities that made them fall in love (and then out of it) behind bars.