A new documentary about serial killers Fred and Rose West will contain "previously unseen police video and unheard audio recordings", Netflix has said.
Fred & Rose West: A British Horror Story will detail how they tortured, raped and murdered an unknown number of women in Gloucester between 1967 and 1987.
The new documentary will be centred on the victims' families, and how Gloucestershire Constabulary uncovered the crimes.
Netflix said the documentary would give "insight into the pain and torment" that the families "went through for decades".
Rose West is currently serving a life sentence after being found guilty in 1995 of murdering 10 girls and women, which included her 16-year-old daughter Heather and her eight-year-old stepdaughter Charmaine.
Fred West never stood trial as he took his own life in prison in January 1995 after nine sets of bones were found under the couple's house.
