Spokespeople for the Justice Department, the FBI and Lausch declined to comment. Sauber said the Biden documents were discovered by the president’s lawyers and voluntarily turned over to authorities. After Trump’s lawyers handed over 38 classified documents in response to the subpoena, an FBI search recovered more than 100 additional classified documents that were not turned over to authorities. The Biden documents “were not the subject of any previous request or inquiry by the Archives,” Sauber said in the statement. Legal experts say that it is not uncommon for some people who have security clearances to mishandle classified documents.