Определение и Значение "catch somebody in the act"

What is the origin of the idiom "catch someone in the act" and when to use it?

The idiom "catch someone in the act" has its origins in the concept of witnessing or discovering someone in the midst of committing a wrongdoing or engaging in prohibited behavior. The phrase emphasizes the act of apprehending or observing someone red-handed, providing undeniable evidence of their actions. It conveys the idea of catching someone in the very moment of their transgression, leaving no room for denial or escape.