It was made with the full backing of the victims'families, and was based on two years research, including interviews with detectives, relatives of the murdered children, and Hindley's brother-in-law David Smith.
It was made with the full backing of the victims'families, and was based on two years of research. Writer Neil McKay based the story on the gathered research; which included interviews with detectives, relatives of the murdered children, and Hindley's brother-in-law David Smith.