A person who captures and holds people or animals(noun)
WordNet. Princeton University. 2010.
Use "capturer" in a sentence
"My capturer was a boy, and as remarkable a specimen of a boy as it has ever been my lot to meet during the whole of my career."
"The story line is fast-paced; mostly driven by the chained hero and his female capturer who takes him although there is a troublemaking villain trying to use the situation for personal gain."
"Isaac Julien, a groundbreaking filmmaker and member of the Creative Caribbean Network has proved once more to be the supreme capturer of cultural identities and narrator of seemingly undisclosed histories."