John Bolton, who once served as a top advisor to President Trump, denied wrongdoing in a Maryland courtroom. He entered a not guilty plea Friday to allegations of mishandling classified information, setting the stage for further legal scrutiny.

John Bolton, who served as President Trump’s national security adviser, arrived at a federal courthouse to surrender on 18 federal charges involving classified documents. The criminal case has placed renewed focus on how top officials manage sensitive records. Observers say the trial may influence future debates on government secrecy.