apprehender
app·re·hen·der
noun
2.
a person who seizes or arrests (especially a person who seizes or arrests in the name of justice)
Origin
From apprehend + -er.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.