Here is the BBC confirming it:
http://www.bbc.com/news/magazine-31359021
The protest leaders, some of whom now hold positions of power in the new Ukraine, insist full responsibility for the shootings lies with the security forces, acting on behalf of the previous government.
But one year on, some witnesses are beginning to paint a different picture.
And the Western backed coup from the inside: http://www.bbc.com/news/world-europe-26079957
Ukraine crisis: Transcript of leaked Nuland-Pyatt call
The article names them. One is in charge of a Romney super-pac.