While Wang Ye was attending the graduation ceremony, another major event was unfolding!
The Joint Investigation Team, led by Dania, announced an official investigation into Luzhikov and sent an official letter to the Kremlin, requesting approval to initiate the process of impeaching Luzhikov as the Governor in the Duma!
As for why the impeachment needed to proceed before Luzhikov's criminal activities were officially confirmed—it was because his position as Governor, which had been elected, afforded him a degree of judicial immunity, thus necessitating his dismissal before further judicial proceedings could continue.
Of course, the bold move by the Joint Investigation Team also indicated that they were confident enough in their evidence to ascertain Luzhikov's crimes.
Otherwise, the Kremlin would never approve it.