article_snippet: Mr Nemtsov, 55, was shot four times in the back while walking along a bridge in full view of the Kremlin with Chechen leader Ramzan Kadyrov model girlfriend Anna Duritskaya, 23.
article_snippet: It was not clear if either of the men were believed to have fired the shots that killed Mr Nemtsov.
article_snippet: Russian opposition leader Boris Nemtsov, who was killed while walking with Mr Nemtsov girlfriend in Red Square in full view of the Kremlin .
article_snippet: At the time of Mr Nemtsov death Mr Nemtsov had been working on a report about Russian military involvement in the eastern Ukraine conflict .
article_snippet: At the time of his death his death Mr Nemtsov had been working on a report about Russian military involvement in the eastern Ukraine conflict.
article_snippet: Mr Nemtsov was also in the midst of organising a march against the war and had written a number of reports in recent years linking Putin and other politicians to alleged corruption.
article_snippet: The shooting occurred a few hours after Mr Nemtsov had made a radio appearance denouncing Putin for 'mad, aggressive' policies in Ukraine.
highlights_snippet: Russian opposition leader Boris Nemtsov was killed last week after being shot in the back while walking near the Kremlin .