Just watched a documentary - one of those who have behavioural, language and psychological experts on, passing judgement with hindsight - on JS interview with Andrew Neil. What they point out, throughout it, was that when Saville was pressed on his private sex life, he openly resorted to threats. One of his friends recorded a comment about him 'always being a one for the young girls', before hastily adding "Er ... over sixteen, of course!" When the 'friend' went on to describe an encounter in a hotel with a "Norma", Saville shut down immediately. Neil asked him if he remembered 'Norma'. JS went on to say he couldn't remember any Norma and that his friend was married now, and JS was 'protecting' his friends reputation - a clear threat!
Throughout the interview JS issued threats about anyone speaking, especially using the words 'grass', 'snitch', and 'a muerta' - phrases usually associated with crime. When asked why JS had refused for his secretary to take part in the programme, JS said "She's my secretary. She should stick to secretary-ing."