Who really killed Hilda Murrell?

(From Guardian Unlimited)

Hilda Murrell was murdered in March 1984. Who killed her - and why - has already been the subject of books, plays and films, and the conviction of a man for her abduction and murder in 2005 failed to answer many of the questions surrounding her death.

The reasons for this enduring enquiry are exposed at length in A Thorn In Their Side, a book being launched this week to mark the 28th anniversary of her death. The author is Hilda's nephew, Robert Green, with whom she had a close relationship and who was a commander in naval intelligence during the Falklands war. He has followed and chronicled the case meticulously.

Was this just a random, bungled burglary by a lone 16-year-old - as the police would have it - or was it an operation involving several individuals on behalf of a government agency, namely …