President Biden’s cache of classified documents reportedly included material marked “Top Secret,” the highest level of classification in the country.
The classified material was found among about 10 classified documents from Mr. Biden’s think tank in the fall, a federal official familiar with the investigation told CBS.
Top secret material could cause “extremely serious harm” to national security if leaked.
Fewer than 10 classified documents were discovered at Mr. Biden’s residence in Wilmington, Delaware, bringing the total number of classified documents at the two locations to about 20.
None of the documents found at Mr. Biden’s residence were marked Top Secret.
Federal law strictly prohibits the removal or retention of classified documents or materials outside of secure locations without authorization, which Mr. Biden would not have as vice president in the Obama White House.
The White House has confirmed that classified government documents dating back to Mr Biden’s time as vice president in the Obama White House were discovered in a Washington office building he used when he was a professor emeritus at the University of Pennsylvania.
The documents were discovered on November 2, just six days before the midterm elections. The case only became public when CBS news learned about it.
A second batch of classified documents was later found in Mr. Biden’s garage in Wilmington by White House aides. Mr. Biden’s staff notified the Justice Department of the discovery of the second batch on December 20.
Mr. Biden said the second batch was discovered near his prized 1967 Corvette Stingray.
The president’s problems with classified documents have compounded his political headache as he weighs a 2024 re-election bid and forced him to take a defensive stance in the last half of his remaining term.
House Republicans, now the majority, have vowed to investigate Mr. Biden’s mishandling of classified material. Attorney General Merrick Garland also appointed a special prosecutor to investigate the case.
Mr. Garland appointed Robert K. Gurr, a former U.S. attorney in Maryland who was appointed by President Trump, as special counsel to look into the dossier situation.
Mr Gurr is the second special adviser appointed by Mr Garland in the past three months. In November, he appointed Jack Smith to oversee the investigation into Mr. Trump, including whether he illegally stored classified documents at his residence and office at his Mar-a-Lago estate in Palm Beach, Florida.
– Jeff Mordock contributed to this story