This sparked an FBI investigation into how she had obtained it.

The information was gathered during an FBI investigation into political corruption in the city.

The effort led to an FBI investigation, but no charges were ever filed.

An FBI investigation, no matter how baseless, meant my career was over.

Well certainly not enough to start an undercover FBI investigation.

The million - the whole 'project' - was part of an FBI investigation.

Some libraries removed his books, and he became the subject of FBI investigations.

Many current county officials are under an FBI investigation, and some have been charged with crimes.

"Do you have any idea why this didn't turn up during the FBI investigation of his background for the clearance?"

It was some time after they disappeared before the bodies were discovered, as a result of an FBI investigation and national media attention.