During an august 5 hearing before zanesville. To witness someone in the act of doing something wrong, immoral, or illegal. This idiom is typically used when someone. Verkkogiven how it was used in the earliest references, the phrase “red hand” or “redhand” probably referred to people caught with blood on their hands from murder or poaching. Verkkoofficers from the met covert policing command and central london robbery teams set up the undercover sting, in which officers wear genuine luxury. What's the origin of the phrase 'caught red.