Yovanovitc was neck deep in allocation of grantfunding of the USA in Ukraine and they better find out where the money went to since there are indication that companies who got fu nding were Burisma, Viscoli (owned by Nancy Pelosi's son) and Stepanek who has an American affiliate on the Board of which two staff members of Schiff served.
An audit is necessary - but it would be difficult because the documents may have been destroyed, since the Bank handling IMF and other funding in Ukraine have been closed down due to corruption and the same bank donated $28 million to the Clinton Foundation.
Any real investigation would have implicated all the above in corruption - hence the panicked impeachment effort by the Democrat leadership, Yovanovitc better turn state evidence if she wants to stay out of jail,