The investigation into former President Donald Trump that led to federal authorities raiding his Florida home at Mar-a-Lago last week centers around several potential criminal violations.

Multiple sources told The New York Times that at least one of Trump’s lawyers signed a written statement to the U.S. Department of Justice earlier this summer that claimed all classified material and boxes in a storage area on the property had been returned to the federal government. Agents searched the storage area and Trump’s office and residence on the property.

Federal investigators recovered at least five sets of top secret documents, three sets of secret documents, and three sets of confidential documents during their search, which U.S. Attorney General Merrick Garland authorized.

The signed declaration, combined with the at least 11 sets of classified documents that were discovered on the property, could mean that either Trump or his legal team potentially lied to federal investigators.

The sections of the U.S. criminal code that were cited on the search warrant indicate the investigation centers around potential violations of the Espionage Act, the unlawful taking of government records, and obstruction of justice related to destroying documents.