Yanukovych has not been back to Ukraine since fleeing for Russia in 2014.
The Ukrainian government claims to have uncovered weapons used to kill over 100 pro-European protesters in 2014.
Ukraine has dismissed claims by Yanukovych that he is in exile against his will.
The toppled leader's lawyer said he is drafting a case to bring the ousted leader back.
The American film maker called the portrayal of events in Ukraine “a surreal perversion of history”
Moscow feared “that an interim government might make a move to NATO or might make a move against the Black Sea fleet”