The Prosecutor General's Office found new witnesses in the YUKOS case, but lost the old one The YUKOS case , which developed after the departure of the former Prosecutor General Vladimir Ustinov, as it seemed from the outside, only by inertia, suddenly received a “new breath” yesterday. Prosecutor General Yuri Chaika, speaking to reporters yesterday, reported a number of new details of this investigation, which, as it turned out, is very actively ongoing.