Of course Shokin was lying. He was never actively investigating Burisma. He spent 2 years protecting Zlochevsky.

Solomon: These once-secret memos cast doubt on Joe Biden’s Ukraine story
Hundreds of pages of never-released memos and documents – many from inside the American team helping Burisma to stave off its legal troubles – conflict with Joe Biden’s nar…

so, there is contradictory evidence that suggest he was investigsting burisma, however, ask yourself, america gives money to many different countries, but the only one that biden cared about corruption in was the one that his son was doing business with.....in fact, apparently biden, pelosi, romney and kerry all had family members working for companies in ukraine...odd?