How is it possible to be more evil than Jimmy Saville? Step forward prison officer and cook Neville Husband, now regarded as the most prolific sex offender in British history. Hundreds of young men were abused by Husband, mainly at a young offenders detention centre outside Durham. How did he get away with if for years before finally being convicted of abusing just five teenagers in 2003? His real tally of misery runs into several hundreds and all the while a blind eye was turned by colleagues and bosses. In this epsiode we also explore what makes a man become a paedophile and has the world changed since Neville Husband was on the prowl 20 years ago.