MI6codebreaker Gareth Williams may have been murdered because he was becoming suspicious of a mystery couple befriending him.
Spy chiefs have been forced to consider the theory that the young, Mediterranean-looking couple seen at his home weeks before he died could have been foreign agents targeting him because of his superb encryption skills.
They are considering the possibility that Williams, whose naked body was found locked in a bag in his bath, was under surveillance because he was living at an address known to be used by security service staff in Alderney Street, Pimlico, central London.
Experienced foreign agents would have quickly built up a profile of the 31-year-old keen club cyclist’s double life and then worked on a plan to get close to him by exploiting his weaknesses: drag cabaret, gay bars and expensive women’s clothing and wigs. They could have befriended him by striking up conversation in one of his regular haunts.
Their approach would have been tailored to appeal to his fantasies. Once they had gained his confidence, they would have tried to see what secrets they could get from him.