new politkovskaya charges expected russian investigators marked fifth anniversary anna politkovskayas murder announcing file new charges previously arrested suspects lom ali gaitukayev native chechnya accused organising shooting investigative journalist critical vladimir putins charges suspected hitman rustam makhmudov expected brothers moscow police officer sergei khadzhikurbanov stood trial charges helping stage killing court guilty 2009 the russian supreme court overruled acquittal sent case prosecutors gaitukayev uncle gunned elevator moscow apartment building 7 october 2006 said dmitry pavlyuchenkov senior police officer time killing helped track politkovskayas movements shotthe news welcomed politkovskayas newspaper novaya gazeta owned alexander lebedev owner independent london evening standard britainbut paper lamented slow progress finding person ordered killed putins birthday fuelling speculation involvement senior officials kremlin responsible journalist freedom>press putin>vladimir lebedev>alexander evening standard>london evening class=author>