Boris Nemtsov was gunned down last week in Moscow while with girlfriend . The Russian opposition leader had been a vocal critic of President Vladimir Putin and his policies since he first took office as president in 2000. Close aide claims he feared he was being bugged leading up to his death . Olga Shorina says he was forced to hand write notes to communicate . Came as they discussed an investigation into fighters in eastern Ukraine . Ms Shorina says Mr Nemtsov had evidence of Russian soldiers inside Ukraine .
Boris Nemtsov was gunned down last week in Moscow while with girlfriend . He was a prominent opposition figure and critic of president Vladimir Putin . Close aide claims he feared he was being bugged leading up to his death . Olga Shorina says he was forced to hand write notes to communicate . Came as they discussed an investigation into fighters in eastern Ukraine . Ms Shorina says Mr Nemtsov had evidence of Russian soldiers inside Ukraine .