Between July 1963 and October 1965 Myra Hindley and Ian Brady abducted raped, tortured and murdered 5 children in Manchester Uk, burying their bodies on Saddleworth moor. A particularly shocking case that's still studied in great detail to this day. After the arrests police were only aware of 3 murders but that would change after finding a suitcase containing amongst other things, a tape recording of the torture, rape and murder of a 10 year old girl.