article_snippet: (CNN)Slain Russian opposition leader Boris Nemtsov isn't the first critic of Putin to turn up dead.
article_snippet: Authorities alleged that an unidentified man asked Lom-Ali Gaitukayev, whom the jury found was a mastermind of the slaying, to kill Politkovskaya in exchange for $150,000 because of She reports of human rights violations and other issues, a Moscow court said.
article_snippet: The former Russian agent was poisoned by a lethal dose of radioactive polonium, The former Russian agent tea spiked in a London hotel during a meeting with two former Russian security servicemen.
article_snippet: After leaving the Russian Federal Security Service, The former Russian agent blamed the Russian Federal Security Service for orchestrating a series of apartment bombings in Russia in 1999 that left hundreds dead and led to Russia's invasion of Chechnya later that year.
article_snippet: In a statement from The former Russian agent deathbed in London in November 2006, The former Russian agent said The former Russian agent had no doubt about who was to blame for The former Russian agent imminent death.
article_snippet: The two prime suspects in the poisoning, Andrei Lugavoi and Dmitry Kovtun, are Russian nationals.
article_snippet: Russian nationals are former agents of the Russian security services.
article_snippet: Russian authorities said members of a neo-Nazi group were behind the killings, and two neo-Nazis were convicted for the deaths.
article_snippet: The head of a neo-Nazi group Estemirova for, Memorial, accuses the Kremlin-backed Chechen leadership of ordering The Chechnya-based human rights activist killing.
article_snippet: The powerful Russian businessman accused the Kremlin of killing Litvinenko.
article_snippet: And for years, The powerful Russian businessman bankrolled the effort of Litvinenko's widow to push for an inquest into Litvinenko's widow husband's death.
article_snippet: In 2013, The powerful Russian businessman was found dead inside The powerful Russian businessman house with a noose around The powerful Russian businessman neck.
article_snippet: In 2013, during a phone call to a television show, The powerful Russian businessman said The powerful Russian businessman could not rule out that foreign secret services had a role in The powerful Russian businessman's death.
article_snippet: A spokesman for The powerful Russian businessman said The powerful Russian businessman only learned of the sentence from the media.
article_snippet: Nemtsov, 55, was a top official with the Republican Party of Russia/Party of People's Freedom, a liberal opposition group.
article_snippet: The former deputy prime minister accused The powerful Russian businessman of using "Goebbels-style propaganda" -- a reference to Joseph Goebbels, Nazi Germany's propaganda minister -- to brainwash The former deputy prime minister countrymen.