According to this report by The Saker, http://www.globalresearch.ca/the-boris-nemtsov-assassination-russias-non-system-opposition-refuses-to-blame-the-kremlin/5434206 , the Washington-financed Russian opposition has not, as Washington hoped it would, joined the Western anti-Putin media campaign. Possibly the Washington-financed Russian NGOs have wised up from observing events in Ukraine. In place of "more democracy," they got a Washington stooge government squandering Ukraine's last cent on a losing war.

The most likely explanation of Nemtsov's murder is that the CIA decided, as Nemtsov was completely marginalized as an opposition politician with 5% as against Putin's 85%, that Nemtsov was worth more dead than alive. But the ploy, if that is what it is, has not worked inside Russia.

Part of the circumstantial evidence that Nemtsov's murder was a CIA tactic to destabilize Russia is the orchestrated US media. The New York Times, Washington Post, Wall Street Journal, NPR, and the rest of the presstitutes were ready on cue with reports insinuating that Putin was responsible. Stephen Lendman has done a good job tracking the US media's unquestioning adherence to Washington's propaganda line. http://sjlendman.blogspot.com