Alexander Litvinenko

Alexander Valterovich Litvinenko was a British-naturalised Russian defector and former officer of the Russian Federal Security Service who specialised in tackling organised crime. A prominent critic of Russian President Vladimir Putin, he advised British intelligence and coined the term "mafia state." In November 1998, Litvinenko and several other FSB officers publicly accused their superiors of ordering the assassination of the Russian oligarch Boris Berezovsky.