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Alexander Valterovich Litvinenko (1962 – 2006) was a fugitive officer of the Russian FSB secret service who specialised in tackling organised crime. In November 1998, Litvinenko and several other FSB officers publicly accused their superiors of ordering the assassination of the Russian tycoon and oligarch Boris Berezovsky. Litvinenko was arrested twice before fleeing to the United Kingdom where he was granted asylum.
During his time in London, Litvinenko wrote two books, Blowing Up Russia: Terror from Within and Lubyanka Criminal Group, wherein he accused the Russian secret services of staging the Russian apartment bombings and other terrorism acts in an effort to bring Vladimir Putin to power. He also accused Putin of ordering the murder in October 2006 of the Russian journalist Anna Politkovskaya.
On 1 November 2006, Litvinenko suddenly fell ill and was hospitalised in what was established as a case of poisoning by radioactive polonium-210, resulting in his death on 23 November. A British murder investigation pointed to Andrey Lugovoy, a member of Russia’s Federal Protective Service, as the prime suspect. The United Kingdom requested the extradition of Lugovoy, but the request was refused.
Extracted from Wikipedia.