Steve Neavling

The FBI agent whose investigation brought down CIA Director David Petraeus played a major role in foiling a terrorist attack.

The USA Today reports that Special Agent Frederick Humphries II helped stop a terrorist plot to blow up Los Angeles International Airport in 2000.

Humphries also fatally shot a knife-wielding man at Tampa’s MacDill Air Force Base in 2010, the USA Today reported.

Now Humphries is credited with kickstarting the Petraeus investigation after he first saw threatening emails from the CIA director’s biographer, Paula Broadwell.