Lugovoy Lie Detector Test: Who Killed Litvinenko?State Duma deputy Andrey Lugovoy, who the UK considers the main suspect in the killing of former FSB officer Aleksandr Litvinenko, did not commit the murder, a British lie detector test shows.

Lugovoy was asked several questions in connection with the 2006 death of Litvinenko by the British Polygraph Association in Moscow. Asked if he had directly or indirectly contributed to the death, and whether he had dealt with polonium, he replied "no" to all questions.

Aleksander Litvinenko died from poisoning by the radioactive substance polonium 210 in November 2006 in a London hospital. British authorities accused Lugovoy of being involved in the murder, while he maintains his innocence. The incident seriously damaged relations between Russia and the UK.

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