"This FBI will not tolerate those who seek to betray our country and put Americans in harm’s way," director Kash Patel said.

The revelation could be coming at a sensitive time as President Donald Trump prepares for a China trip that's already been delayed once.

Experts are pumping the brakes on all the newfound excitement surrounding Charlie Kirk's death after a bombshell report.

Lawyers for former FBI agent John Connolly filed a motion in Miami-Dade Circuit Court on Monday seeking to vacate his conviction.

Former FBI director James Comey had a very bad Thursday. First he was accused of leaking a secret codename, and then...

"If he was leaking, he ought to be held accountable, just like anybody else would be," one prominent Republican said.

Mueller found nothing. But even if he did, how could anyone trust an investigation that was apparently this sloppy and biased?

The FBI amasses more evidence as it investigates the disappearance of Nancy Guthrie and widens the dates of the probe.

The FBI arrested several Indian nationals in connection with a fake robbery scheme aimed at helping them secure visas.

The FBI and UFC are teaming up for a "first-of-its-kind" partnership focused on training academy students and senior staff.