This British convicted child killer serving 10 life sentences for the murders of three other girls was offered immunity from prosecution for the murder of a girl 19 years ago if he provides information leading to the discovery of her remains. The body of Genette Tate, who was 13 when she disappeared in Aylesbeare, Devon, in August 1978, has never been found. Detectives suspect that Robert Black may have killed her. Black was linked to the area where Genette disappeared by tracking his gas station receipts.