turned into a vocal critic of russia,. when he was poisoned in london, it made headlines around the world. a lethal toxin in a cup of tea. it was a tiny little dirty bomb. it s nuclear terrorism. why was he? kilter unravel the mystery, we follow the tale of a dark conspiracy. are you frightened for your life? will me and confront the pain prime suspect. did you put polonium in the tea? and now, is a danger coming closer? we re two men may think waiting in the bushes. one man said shooting. an attack on the expert helping us with this story. people say it s never going to happen here. i know that can happen here, because it happened to my husband. , dateline . former russian agent, alexander litvinenko former russian agent jim alexander litvinenko was a four critic of the russian government. but in his world, existent formation could make you a very rich man or a dead one. his murder set off an international investigation to discover who wanted in silen
deaths have been recorded. there was boris berezovsky, the russian oligarch litvinenko said he refused to assassinate. another prominent critic of putin. in 2013, he was found dead in his london home. originally called a suicide, a judge said he couldn t rule out murder. the way he killed himself he hanged himself with a scarf? a scarf, in the bathroom. and the fact that his bodyguard was not there. it raises questions. in february, 2015, another putin critic, boris nemtsov, was gunned down in the shadow of the kremlin. the victim was about to lead a major rally against putin. it went on without him. five chechnya nationals were arrested and put on trial. they have denied denied involvement in the murders. nemtsov s party colleague, vladimir kara - murza suspected putin loyalists were behind the assassination. people should not be killed
conclusion. which litvinenko himself reach before he died. mr. litvinenko came to the awful awful realization that he had been the victim of a political assassination by agents of the russian state. an expert witness testified the polonium that killed litvinenko could only have come from russia. president putin s spokesman declined our request for an interview. and in march, 2015, putin gave lugovoi a metal. the order of merit to the fatherland, second class, for his work in the duma. you think russia will ever come clean and this will be known? i believe, one day we will know this. it will be very obvious for people to decide. and there years she s been looking for answers, other questions have multiplied, other deaths have been recorded. there was boris berezovsky, the russian oligarch litvinenko said he refused to assassinate.
mr. litvinenko came to the awful realization that he had been the victim of a political assassination by agents of the russian state. reporter: and in march 2015, an expert witness testified the polonium that killed litvinenko could have only come from russia. president putin s spokesman declined our request for an interview. in march 2015 and in 2015 putin gave lugovoi a medal, the order of merit to the fatherland, second class, for his work in the duma. you think russia will ever come clean and this will be known? i believe one day we will know this. it will be very obvious for people to decide. reporter: in the years she s been looking for answers, other questions have multiplied, other deaths have been recorded. there was boris berezovsky the russian oligarch litvinenko said he refused to assassinate. another prominent critic of putin.
awful realization that he had been the victim of a political assassination by agents of the russian state. reporter: an expert witness testified the polonium could have only come from russia. the kremlin ignored the inquiry. president putin s spokesman declined our request for an interview. and in 2015 putin gave lugovoi a medal, the order of merit to the fatherland, second class, for his work in the duma. you think russia will ever come clean and this will be known? i believe one day we will know this. it will be very obvious for people to decide. reporter: in the years she s been looking for answers, other questions have multiplied, other deaths have been recorded. there was boris berezovsky the russian oligarch litvinenko said he refused to assassinate. another prominent critic of putin. in 2013, he was found dead in