Opposition leader Boris Nemtsov murdered in Moscow on Friday . The Russian government has blamed the killing on a Chechen militant group and said it was an act of terrorism. There are reasons why Vladimir Putin would want Nemtsov dead . Russian government has denied any involvement in killing .
Opposition leader Boris Nemtsov murdered in Moscow on Friday . Browder : There are reasons why Vladimir Putin would want Nemtsov dead . Russian government has denied any involvement in killing .