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 . Mr Nemtsov says Ms Shorina 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 .