Ahmed Abu Khattala was the first person charged and prosecuted in the attacks in Benghazi, Libya, which left four Americans dead, including an ambassador.
American officials paid the informant after he helped build a case against Ahmed Abu Khattala, a suspect in the 2012 Benghazi attacks, and orchestrate his capture.
President Trump bemoaned the slow speed of terrorism cases and weak punishments for suspects, but experts say and data show swift and severe action.
The man is the second suspect to be apprehended in the 2012 assault and will be brought to Washington to face criminal charges.
Liberal blogs’ claims have dubiously blamed the deaths of four Americans in Niger on President Trump’s Pentagon, travel ban and even alleged ties to Russia.
Wearing disguises in the courtroom, the C.I.A. officers described how their rescue team tried desperately to find the American ambassador and later came under mortar attack.