The Air Force failed to report the Texas shooter's criminal history to the FBI, which would have blocked his gun purchases. But concerns over military crime reporting have been raised for years.
The FBI is blaming its inability to unlock the cellphone of the Texas shooter on the tech industry's encryption standard. But some experts say if the FBI had acted more quickly, it would have access.
George Papadopoulos lied to FBI agents about meeting a professor with Russian ties who had promised to provide "dirt" on Trump's Democratic rival, Hillary Clinton.
Someone left an improvised explosive device at an airport in Asheville, N.C., last week, and a new backpack offered a clue. Some are wondering why the incident didn't receive more national attention.
More than a week after the Las Vegas massacre, investigators are still without a motive. "What survivors really need sometimes is to get closure," one psychologist says.
Wray, who was confirmed by the Senate in August, was officially sworn in on Thursday. Wray was picked to head the FBI after President Trump fired James Comey in May.
James R. Fitzgerald says Ted Kaczynski's writings helped cracked the case that confounded the FBI for more than 17 years. Manhunt: Unabomber, a TV series on the Discovery Channel, retells the story.