From Longman Dictionary of Contemporary Englishcaptorcap‧tor /ˈkæptə $ -ər/ noun [countable] KEEP somebody IN A PLACEsomeone who is keeping another person prisoner → captive He managed to escape from his captors.
Examples from the Corpus
captor• Marian already felt her captors were not strangers to her.• An extension of this may occur when the victim actually, becomes a supporter or advocate of her captor.• Mann was finally freed by his captors.• Nothing specific, but he knew his captors could beat the rest of it out of him.• Park then placed him under house arrest, while his captors went free, and later imprisoned him for sedition.• One of their captors filmed the shootings with a video camera.• Hostages are said to develop similarly complex attachments to their captors.Origin captor (1500-1600) Late Latin Latin captus; → CAPTIVE1 