Former U.S. President Donald Trump ordered employees at his Florida resort to delete security videos as he was under investigation for retaining classified documents, U.S. prosecutors said on Thursday as they broadened the case against the former U.S. president and charged a second member of his staff with helping to hide documents.

U.S. Special Counsel Jack Smith filed three new criminal counts against Trump, bringing the total to 40, and charged a maintenance worker at Trump's Mar-a-Lago resort, Carlos De Oliveira, with conspiracy to obstruct justice, accusing him of helping Trump to hide documents.

De Oliveira, 56, told another worker at the resort where Trump lives that "the boss" wanted security videos of the property in Florida deleted after the Justice Department subpoenaed them.