The origins of the coronavirus pandemic remain contested; the evidence is incomplete. But pundits, activists, and members of the Trump administration have long insisted that the case is closed, and that the virus slipped out from a lab in China. They’ve maintained the view that U.S. scientists were involved and later tried to hide the facts. They’ve said that justice must be served. Now the reckoning they want appears to have arrived. An expert on the flu got hauled off by the FBI. A coronavirus