The death of a Russian tycoon found dead in a bath at his Berkshire mansion remains unexplained, although the property has now been declared safe by radiation experts.
ITV News' Tom Barton reports on the investigation into Boris Berezovsky's death.
Specialist officers in chemical, biological, radiological and nuclear substances gave the Ascot home the all-clear after examining the property, leaving Thames Valley Police to investigate his death.
The businessman, whose body was discovered yesterday by a bodyguard, acquired his fortune in the 1990s after the privatisation of state assets following the collapse of Soviet Communism.
He fled to the UK in 2000, seeking political asylum, after falling out with President Vladimir Putin.
Last year he lost a multibillion-pound High Court fight with Chelsea Football Club owner Roman Abramovich.
In an interview with Forbes Russia magazine on the eve of his death, Mr Berezovsky said he had lost "meaning" from his life and wanted to return to Russia.
He said he had "underestimated how important" Russia was to him, and he felt uncomfortable as an immigrant in Britain.