Test results show that the Russian oligarch was not assassinated.
Russians protested Vladimir Putin on Saturday. (World Economic Forum/Flickr)
Saturday's protest was the largest since June.
Vladimir Putin (Creative Commons)
Presidential election win earns Putin six more years in Kremlin.
As many as 120,000 may have flooded the streets around the Kremlin
Putin will have to deal with protesters' demands when he returns as president. (Creative Commons)
Demonstrators cry "election fraud."