One of the highest-ranking FBI agents to ever face criminal charges was sentenced to over four years in prison on Thursday for secretly colluding with a Russian oligarch. Charles McGonigal, a former ...

(CNN) — Just days before the United States launched a major military operation in Iran, FBI Director Kash Patel fired a dozen agents and staff members from a counterintelligence unit tasked with ...

WASHINGTON — The FBI is offering a $200,000 reward for information leading to capture and prosecution of a former U.S. Air Force counterintelligence specialist who defected to Iran in 2013 and was ...

US authorities have dismantled a sophisticated operation by China's intelligence services, which used 13 fake consulting ...