Anna Duritskaya , 23 , watched as Boris Nemtsov was shot four times . The Ukrainian model has been questioned extensively by Russian police . She has pleaded to return to Ukraine but is being held in a safe location . Thousands marched in Moscow in protest against Mr Nemtsov 's death . Comment:
Anna Duritskaya , 23 , watched as Boris Nemtsov was shot four times . The Ukrainian model has been questioned extensively by Russian police . She has pleaded to return to Ukraine but is being held in a safe location . Thousands marched in Moscow in protest against Mr Nemtsov 's death . Critics claim the 55-year-old was killed for publicly condemning President .