Coroner: U.K. spy Gareth Williams death may remain a mystery (AP) LONDON - A coroner says the mysterious death of a British spy whose naked body was found inside a locked sports bag may never be solved. Coroner Fiona Wilcox said Wednesday that it is unlikely the death of 31-year-old Gareth Williams would "ever be satisfactorily explained" as she began delivering an inquest verdict. What killed U.K. spy found in duffel bag? Williams worked for Britain's secret eavesdropping service GCHQ but was attached to the MI6 overseas spy agency when his remains were found in August 2010 at his London apartment, in the bag and inside a bathtub. Police have suggested Williams' death may have been due to a sexual encounter gone awry, but his relatives insist it must have been related to his work. Detective Chief Inspector Jackie Sebire, who led the investigation, told the inquest Tuesday that she would've expected MI6 to tell her in 2010 about memory sticks and a gym bag it had found in Williams office, but that she hadn't learned of the items until this week.