Gabby Petito's killer boyfriend Brian Laundrie was seen acting "like a lunatic" two weeks before he killed her in Wyoming, according to notes from the FBI.

The FBI arrested two teenage girls plotting a “mass casualty attack” using pipe bombs and guns targeting Memorial High School in Harris County, Texas, police said.

The robber is seen on surveillance video pointing a silver pistol to force the pharmacist to hand over drugs from the safe.

The new FBI director instructed personnel not to respond to Musk's demand to justify their job or face dismissal.

Patel inherits an FBI gripped by turmoil as the Justice Department has forced out a group of senior bureau officials in the past month.

Peltier's imprisonment had symbolized systemic injustice for Native Americans across the country who believe in his innocence.

The Federal Bureau of Investigation is offering a reward of up to $25,000 for information that leads to the location of a man connected to a homicide that happened at a Long Beach restaurant in 2008.

Experts say California-based Zizian group has some hallmarks of a cult, and wonder what's next after multiple members of the group were arrested.

The FBI is pushing back against US Homeland Security Secretary Kristi Noem, saying her suggestion that “corrupt” agents leaked details of an immigration raid were “deeply irresponsible.” Former FBI deputy director Andrew McCabe reacts and explains the seriousness of the allegation.