1.
caught in the act; flagrante delicto; red-handed
A crime witnessed as it is being committed, or the person caught committing it. In Japanese law, anyone may arrest a person caught in the act of committing a crime (現行犯逮捕). Composed of 現行 (current, in progress) + 犯 (crime, criminal).
Usage
現行犯 is used both for the crime caught in progress and for the person caught committing it. In Japanese law, 現行犯逮捕 (arrest in flagrante delicto) is the only situation where a private citizen can legally arrest someone without a warrant.
Common collocations
Similar words
犯行現場 means crime scene. 現行犯 specifically refers to being caught during the criminal act itself.