According to the U.S. Department of Justice, the FBI began examining Ellaboudy after receiving information that he had purchased precursor chemicals, components and other materials associated with improvised explosive devices. Investigators also found purchases of parts used to construct drones and remotely operated aerial systems. The complaint alleges that Ellaboudy took sick leave in December 2024 after claiming exposure to highly concentrated nitric acid, a chemical that can be used in explosive materials. In September 2025, prosecutors say, he used an official passport issued during earlier employment with the U.S. Army Corps of Engineers to travel from Washington state to...