Why was he controversial figure ? In 2014, Nemtsov ran a vigorous campaign against Putin, revealed his fraud, harshly criticised Putin, and denounced Russia's attack on Ukraine in 2014.
What happened to him? In 2015, just days before he was to lead an anti-war demonstration, Nemtsov, was shot four times outside Russian Parliament, the Kremlin.
Boris's killers in court
Why should you listen? Zhanna Nemtsova, the slain leader's daughter, who is also a journalist and activist, joins Ben Rhodes in telling the story to his assasination.