A former Moscow police colonel has been arrested over the killing of journalist Anna Politkovskaya.
Politkovskaya, a fierce critic of the then-president Vladimir Putin, was gunned down outside her home in 2006.
Investigators have now accused Dmitry Pavlyuchenko of organising her murder.
Investigative Committee spokesman Vladimir Markin said Pavlyuchenko “created the criminal group including three brothers Makhmudov and others. He ordered his inferiors to follow the journalist to discover her everyday route.”
Rustam Makhmudov, the Chechen man accused of pulling the trigger, was detained earlier this year.
In 2009, his two brothers Dzhabrail and Ibragim Makhmudov and another former police officer were acquitted of any involvement due to a lack of evidence.
But the Russian Supreme Court then annulled the verdict and ordered a new investigation.
Politkovskaya’s suspected killer, Rustam Makhmudov, avoided capture and had remained at large since before the trial.