Navalny accused the Russian leader of using state cash to pay for his mistresses
He claims Putin 'has slush fund' to cover the expense of his alleged other women, former gymnast Olympic Alina Kabaeva and ex-mistress Svetlana Krivonogikh
Putin allegedly also spent the sum on his 17-yea-old love child with Krivonogikh
The Kremlin critic also claims to have the leaked floor plans of 'Putin's palace'
Navalny has been detained while facing sentenced for fraud charges from 2014