The naked, decomposing body of MI6 codebreaker Gareth Williams, 30, was found locked in a bag in his London apartment Aug. 23, The Daily Telegraph reported.
Authorities think Williams died after climbing into the bag which was then locked from the outside by another person, as part of a sex game from which Williams took pleasure in being rendered helpless, the Daily Mail reported.
Williams probably died from suffocation and dehydration, the Daily Mail said.
Scotland Yard seeks a Mediterranean couple between the ages of 20 and 30, who entered the apartment in June or July, the newspaper reported.
Officers have not ruled out preventing Williams from continuing important work in intercepting and decrypting foreign powers' messages as a motive for his death, the newspaper said.
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