mikhail kasyanov and other former prime minister mikhail kasyanov and other opposition leaders were among the mourners. also attending were liberal senior officials from putin's government and representatives of western nations opposed to the president's policy on ukraine. >> translator: nemtsov played an important role in promoting democracy in russia. i fully agreed with his criticisms of putin's policy on ukraine. >> some members of russia's opposition suspect the putin administration was involved in nemtsov's death. nemtsov was reportedly preparing to present proof of russia's military intervention in eastern ukraine. after his death, investigators seized his computer and documents. government officials suggest the killing was aimed at laying blame on the administration. putin himself is said to have asked for briefings on the investigation into the shooting. >>> people around the world are hearing the unfiltered voice of the man believed to be jihadi john for the first time. an audio recording has emerged and islamic state militant distance he's an extremist. the masked knife-wieldin