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catch red-handed

Also, catch in the act. Apprehend someone in the course of wrongdoing, as in The boys were trying to steal a car and the police caught them red-handed, or He tried to cheat on the exam, but his teacher walked in and caught him in the act. The first term referred to blood on a murderer's hands and originally signified only that crime. Later it was extended to any offense. The variant (catch in the act) is a translation of the Latin in flagrante delicto, part of the Roman code and long used in English law.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

Related Words for catch red-handed

startle, nab, capture, seize, discover, bushwhack, ambush, take, waylay, grasp, grab