|Zhanna Nemtsova has been working as a TV journalist |
for an independent TV station in Moscow
Zhanna Nemtsova told the BBC that she had received threats, and this was one of the reasons behind her departure.
In a newspaper column, she said Russian propaganda echoed the era of genocide in Nazi Germany and Rwanda.
Mr Nemtsov, a leading Kremlin critic, was shot dead in Moscow in February.
Five suspects have been arrested over the killing, all of them from the Russian republic of Chechnya. However, the investigation has not established who ordered the murder, and one of the suspects has said he was forced to make a confession.
Several critics of Russian President Vladimir Putin have left the country over the last few years, complaining of intimidation and authoritarianism.
A close friend of Mr Nemtsov, Vladimir Kara-Murza, was admitted to hospital with acute kidney failure last month. Doctors have not established a cause and his father told the BBC he suspected poisoning.
|Mourners pay tribute to Boris Nemtsov in Moscow on 7 March 2015|
Boris Nemtsov was murdered as he walked along a bridge in central Moscow
She accused pro-Kremlin journalists of spreading hatred and intolerance, and urged the West to impose sanctions against those involved.
"Many of the texts of Kremlin-controlled media recall the rhetoric of African propagandists," she wrote.
"Putin's information machine - similar to those in Nazi Germany and Rwanda - is using criminal methods of propaganda, and sowing hatred which generates violence and terror."