Shokin wasn’t investigating Burisma at the time BIden made his ultimatum
“Simply put, there were no active investigations into Burisma at the time of Shokin’s removal in 2016. If anything, Shokin served as a barrier to a real investigation into the company. When, for example, Britain’s Serious Fraud Office froze $23m (£19m) of Zlochevsky’s assets after a money laundering investigation, it was Shokin’s office that produced an exonerating letter that Zlochevsky then used to unfreeze the cash. Internal prosecutor reports seen by Bloomberg confirmed that Shokin declined to pursue an investigation at all stages.”