Death of Gareth Williams

Gareth Williams (26 September 1978 – c. 16 August 2010) was a Welsh mathematician and employee of GCHQ seconded to the Secret Intelligence Service (SIS or MI6) who was found dead in suspicious circumstances at a Security Service safe house flat in Pimlico, London, on 23 August 2010. The inquest found that his death was "unnatural and likely to have been criminally mediated." A subsequent Metropolitan Police re-investigation concluded that Williams's death was "probably an accident".

Originally from Anglesey, Wales, Williams, who spoke Welsh as a first language, began studying mathematics part-time at Bangor University, while still at Ysgol Uwchradd Bodedern school, and graduated with a first-class degree at age 17. After gaining a PhD at the University of Manchester, he dropped out from a subsequent post-graduate course at St Catharine's College, Cambridge, and took up employment with GCHQ in Cheltenham in 2001, renting a room for a decade in Prestbury, Gloucestershire. Reportedly an intensely private man and a keen cyclist, Williams was due to return to Cheltenham at the beginning of September 2010 after his annual leave.

Police visited Williams's home during the afternoon of Monday 23 August 2010, as a "welfare check" after colleagues noted he had been out of contact for several days. His decomposing naked remains were found in a red The North Face bag, padlocked from the outside, in the bath of the main bedroom's en-suite bathroom. The police had gained entry into his top floor flat in Alderney Street, Pimlico at around 16:40. His family believe that crucial DNA was interfered with and that fingerprints left at the scene were wiped off as part of a cover-up. No fingerprints, palm-prints, footprints or traces of Williams's DNA were found on the rim of the bath, the bag zip or the bag padlock. A key to the padlock was inside the bag, underneath his body.

...
Wikipedia