Donald Trump is under criminal investigation for potential violations of the Espionage Act and additional statutes relating to obstruction of justice and destroying federal government records, according to the search warrant executed by FBI agents at the former president's home on Monday.
The search warrant - the contents of which were confirmed by the Guardian - shows the FBI was seeking evidence about whether the mishandling of classified documents by Trump, including some marked top secret, amounted to a violation of three criminal statutes.
Most notably, the search warrant authorized FBI agents to seize materials from Trump's Mar-a-Lago residence to investigate crimes in connection with the Espionage Act, which outlaws the unauthorized retention of national security information that could harm the United States or aid an adversary.
The other statutes listed on the warrant include the federal law that makes it a crime to destroy or conceal a document in order to obstruct a government investigation, and the federal law that prohibits the unlawful removal of government documents more generally.
The disclosures, which came in an attachment to the search warrant, mark a dramatic escalation in the justice department's criminal inquiries into Trump. They represent perhaps one of the most treacherous legal and political moments faced to date by the former president.
A conviction for violating any of the detailed laws would be severe: the Espionage Act has a maximum penalty of 10 years in federal prison and the statute for obstruction has a maximum penalty of 20 years, while the statute for destruction of records can also bar anyone convicted from holding future office.
The contents of the search warrant became public days after FBI agents seized 11 boxes worth of materials from Trump's Mar-a-Lago resort in Palm Beach, Florida, including records considered so sensitive that they could not be individually listed in the "receipt" of what was removed.
The most sensitive set of documents removed from Trump's post-presidency home in Florida were listed generically as "Various Classified/TS/SCI" - the abbreviation that stands for top secret/sensitive compartmented information - the source said, among other records.
FBI agents retrieved a total of 11 sets of classified documents, some of which were marked top secret, the Wall Street Journal first reported. Federal agents also took away four sets of top secret documents, three sets of secret documents, and three sets of confidential documents, the receipt showed.
The search warrant receipt did not provide any further detail about the substance of the classified documents. Other materials removed from Mar-a-Lago included binders of photos, information on the "President of France", and a grant of clemency for the Trump political operative Roger Stone.
Caught at the center of a rapidly escalating controversy, Trump lashed out at the justice department on Friday, saying in a statement that he had declassified all of the records in question. "It was all declassified," Trump asserted.
The former president's claim was met with immediate scepticism, partly because the seized documents appeared to retain their original classified markings, according to a source familiar with the matter who spoke on the condition of anonymity to discuss an open investigation.
Trump has offered no details about how the supposed declassification took place, and a former Trump administration aide, Kash Patel, has said that even though Trump did declassify the records, the White House counsel's office never provided the required paperwork.
But whether the former president actually declassified the documents may not ultimately matter. The Espionage Act, for instance, does not distinguish between classified and declassified materials - unauthorized retention of any document relevant to the statute remains a crime.
FBI agents searched Mar-a-Lago on Monday bearing a warrant - approved by Merrick Garland, the attorney general - that authorized a search of "the 45 Office", as well as "all storage rooms and all other rooms or areas … in which boxes or documents could be stored".
The House intelligence committee chairman, Adam Schiff, released a statement regarding the revelations about classified documents found at Mar-a-Lago.
"If reports are accurate and contained among these documents are some of the most highly classified information our government holds - information classified as top secret/secure compartmented information - then it would explain a great deal about why the department and the FBI took the step of obtaining a warrant to recover the documents," Schiff said.
"It appears that the FBI sought to remove those documents to a safe location previously, but Trump did not fully cooperate. Every day that information of such a classification sits in an unsecure location is a risk to our national security. If any other individual had information of that nature in their possession, the FBI would work quickly to mitigate the risks of disclosure."
The committee the California Democrat chairs oversees the FBI as well as other federal law enforcement agencies.
Schiff noted he had confidence in the justice department, while adding: "The protection of classified information, and particularly the protection of sources and methods, is an issue of the highest priority for the intelligence committee, and as we learn more, we will responsibly discharge our oversight responsibilities."