ˈ ̷ ̷| ̷ ̷ ̷ ̷ adverb (or adjective)
Etymology: so called from the idea of a murderer caught with the blood of his victim on his hands
: in the act of committing or exhibiting evidence of having committed a crime or misdeed : with the mainour
surprised the murderer red-handed in the study — Erle Stanley Gardner
caught red-handed with a hand in the cookie jar
have a preacher catch us red-handed in the act of sinning — Frederick Way