catch someone red-handed
Meaning
To catch someone in the act of doing something wrong or illegal, with clear evidence at that moment.
Origin
The phrase dates back to Scottish legal usage (15th–16th c.) where "red hand" meant having blood on one’s hands—caught after killing or butchering, i.e., with obvious proof of guilt.
Notes
Implies being caught in the very act, with unmistakable evidence. Common in everyday speech for both serious crimes and minor wrongdoing.
Examples
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The security guard caught him red-handed trying to shoplift a watch.
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I walked into the kitchen and caught my brother red-handed eating the last slice of cake.
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The auditor caught the manager red-handed falsifying the expense reports.
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Police caught the hacker red-handed after tracking the breach to his apartment.
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She caught her roommate red-handed using her laptop without permission.
Grammar & Usage Notes
Usually used as "catch + person + red-handed". Can be inflected (caught, catching). Often followed by "doing" + noun/gerund clause: "caught him red-handed stealing…".
Synonyms
- catch in the act
- catch someone in the act
- catch someone with their hand in the cookie jar
- bust
Antonyms
- let someone off
- give someone the benefit of the doubt