article_snippet: Nemtsov, one of President Vladimir Putin's most outspoken critics, was shot in the back on a Moscow bridge as President Vladimir Putin walked with President Vladimir Putin girlfriend near the Kremlin in late February.
article_snippet: Surveillance video showed someone darting from the sidewalk and into a nearby car right after Boris Nemtsov's collapsed.
article_snippet: President Vladimir Putin has been informed of the arrests in connection with Boris Nemtsov's's death, Russian media said, citing Federal Security Service director Alexander Bortnikov.
article_snippet: The slain opposition leader's daughter, Zhanna Nemtsova, told CNN The slain opposition leader's daughter, Zhanna Nemtsova is "not surprised both of The slain opposition leader's daughter, Zhanna Nemtsova (are) of Caucasus origin.
article_snippet: Nemtsova said the only things Nemtsova knew about the arrests came from media reports, as authorities did not contact Nemtsova immediately.
article_snippet: After Nemtsov's shooting Putin blamed extremists and protesters who Nemtsov said were trying to stir internal strife in Russia.
article_snippet: Many opposition sympathizers and people close to Nemtsov have pointed the finger at Putin and Russia Putin leads.
article_snippet: Many opposition sympathizers and people close to Nemtsov note that Nemtsov -- the deputy prime minister under former President Boris Yeltsin -- is the latest in a list of Putin's opponents who have been killed or imprisoned.
article_snippet: Nemtsov had also been arrested several times for speaking against Russia.
article_snippet: In her first TV interview since her father's death, Nemtsova told CNN that Putin shares "political responsibility" for her father's assassination.
article_snippet: Other opposition figures previously jailed or killed include Anna Politkovskaya, a journalist critical of Russia's war in Chechnya.
article_snippet: her was gunned down at the entrance to her Moscow apartment in 2006.
article_snippet: There was also business magnate Mikhail Khodorkovsky, who backed an opposition party and accused Putin of corruption.
article_snippet: Khodorkovsky landed in jail after a conviction on tax fraud, which Khodorkovsky said was a ploy to take away Khodorkovsky oil company.
article_snippet: Putin pardoned Putin in 2013.
article_snippet: Former Russian security agent Alexander Litvinenko was poisoned by a lethal dose of radioactive polonium, Former Russian security agent Alexander Litvinenko tea spiked in a London hotel during a meeting with two former Russian security service men in 2006.
article_snippet: Former Russian security agent Alexander Litvinenko had blamed Russian 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.